How to use nitrogen blowing instrument
How to use nitrogen blowing instrument, Total:169 items.
The international standard classification for "How to use nitrogen blowing instrument" includes: Cereals, pulses and derived products , Coals , Chemical reagents , Fertilizers , Body care equipment .
The Chinese standard classification for "How to use nitrogen blowing instrument" includes: Basic standards and general methods on chemical fertilizers , Cereal crop and forage crop in general , Coal analysis methods , Chemical reagent in general , Chemical Measurement , Household health care appliances .
Group Standards of the People's Republic of China
- T/CMA 031-2021 Calibration method for basic nitrogen meters
- T/CPMA 021-2020 Method of on-site detection of ammonia nitrogen in drinking water - Salicylic Acid Method
- T/CAEPI 6-2017 Technical specifications of Pulse Jet Controller for Baghouse
Military Standard of the People's Republic of China-General Armament Department
- GJB 337-1987 Determination method of nitrogen content of nitrocellulose (interferometer method)
Ningxia Provincial Standard of the People's Republic of China
- DB64/T 1734-2020 Soil Hydrolyzable Nitrogen Determination Kjeldahl Method
Professional Standard - Agriculture
- GB 4845-1984 Methods of determination for helium
- NY/T 1105-2006 The rule of rational fertilization nitrogen fertilizer
- NY/T 2419-2013 Determination of total nitrogen in plant - Automatic kjeldahl apparatus method
- NY/T 1121.24-2012 Soil Testing - Part 24: Determination of Total Nitrogen in Soil - Automatic Kjeldahl Apparatus Method
- GB 608-1988 General method for chemical reagent nitrogen determination
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 608-1988 Chemical reagent--General method for the determination of nitrogen
- GB/T 14614.4-2005 of rheological properties of dough using alveograph
- GB/T 22923-2008 Determination of nitrogen,phosphorus and potassium for fertilizers by auto analyzer
- GB/T 30733-2014 Determination of total carbon, hydrogen and nitrogen content in coal—Instrumental method
- GB/T 6625-1986 Test methods for nitrogen content of nitrogen-doped getter
Professional Standard - Machinery
- JB/T 5915-1991 Technical conditions of sequential pulse injection electric controller for bag filter
- JB/T 5915-2006 Sequential type pulse jet controller for baghouse
- JB/T 5915-2013 Sequential Type Pulse Jet Controller for Baghouse
Professional Standard - Commodity Inspection
- SN/T 3005-2011 Test Method for Instrumental Determination of Carbon
- SN/T 0736.11-2002 Chemical analysis of fertilizers for import and export - Determination of nitrogen content by auto analyzer
Professional Standard - Petroleum
- SY/T 5930-2010 Operation and Maintenance for Electromagnetic Instruments
National Metrological Verification Regulations of the People's Republic of China
- JJG 801-2004 Verification Regulation of Chemiluminescent NO/NOx Analyzers
未注明发布机构
- DIN EN ISO 21663 E:2020-02 Method for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulfur (S) by instrumental methods in solid recovered fuels (draft)
- ASTM RR-D02-1901 2018 D8184-Test Method for Ferrous Wear Debris Monitoring in In-Service Fluids using a Particle Quantifier (PQ) Instrument
Professional Standard - Environmental Protection
- HJ 101-2019 Technical specifications and test procedures for water quality on-line automatic monitoring equipment of ammonia
Professional Standard - Light Industry
- QB/T 4699-2014 Energy Efficiency Grades and Assessment Method of Electric Hairdryers
Jilin Provincial Standard of the People's Republic of China
- DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)
工业和信息化部
- YS/T 1179.3-2017 Chemical analysis methods of aluminum slag-Part 3:Determination of carbon,nitrogen-Element analysis method
Hebei Provincial Standard of the People's Republic of China
- DB13/T 2645-2018 General technical requirements for nitrogen trifluoride detector
Inner Mongolia Provincial Standard of the People's Republic of China
- DB15/T 1236-2017 Determination of volatile basic nitrogen in feedstuffs of animal origin by automatic Kjeldahl method
Professional Standard - Military and Civilian Products
- WJ 2261-1994 Verification rules for thermal conductivity and infrared absorption nitrogen and oxygen detectors
American Society for Testing and Materials (ASTM)
- ASTM D7649-10 Standard Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography/Mass Spectrometer Analysis
- ASTM UOP874-88 Pore Size Distribution of Porous Substances by Nitrogen Adsoprtion Using a Quantachrome Analyzer
- ASTM E147-61(1996) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
- ASTM E147-61(2006) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
- ASTM E147-61(2001) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
- ASTM B966-10 Standard Test Method for Permeability of Powder Metallurgy (PM) Bearings Using Nitrogen Gas
- ASTM E1335-04 Standard Test Methods for Determination of Gold in Bullion by Cupellation
- ASTM E1335-04e1 Standard Test Methods for Determination of Gold in Bullion by Cupellation
- ASTM E147-61(2011) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
- ASTM E1335-03 Standard Test Methods for Determination of Gold in Bullion by Cupellation
- ASTM F78-97(2002) Standard Test Method for Calibration of Helium Leak Detectors by Use of Secondary Standards
- ASTM C1069-86(1997)e1 Standard Test Method for Specific Surface Area of Alumina or Quartz by Nitrogen Adsorption
- ASTM D6556-14 Standard Test Method for Carbon Blackmdash;Total and External Surface Area by Nitrogen Adsorption
- ASTM E147-61(2017) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
- ASTM D4622-86(1993) Standard Test Method for Rock Mass Monitoring Using Inclinometers
- ASTM D5373-08 Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Laboratory Samples of Coal
- ASTM D6587-12 Standard Test Method for Yarn Number Using Automatic Tester
PL-PKN
- PN G04561-1992 Solid fuels. Determination of nitrogen with the use of the Perkin-Elmer analyser
- PN E08221-02-1988 Household and similar electrical appliances Hair dryers Methods for measuring the performance
RU-GOST R
- GOST 28795-1990 Wheat flour. Physical characteristics of doughs. Determination of rheological properties using an alveograph
- GOST 32979-2014 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen
- GOST R 54216-2010 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen by instrumental methods
- GOST 32985-2014 Solid biofuels. Determination of carbon, hydrogen and nitrogen by instrumental methods
- GOST R 54244-2010 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen
CZ-CSN
- CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen
Association Francaise de Normalisation
- NF EN 15750:2010 Fertilizers - Determination of the total nitrogen content of fertilizers containing nitrogen only in nitric, ammoniacal and urea form, using two different methods
- NF X34-220:2020 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
- NF EN ISO 20764:2004 Petroleum and related products - Preparation of a test portion of high boiling point liquids for water determination - Nitrogen purge method
- NF EN ISO 14362-3:2017 Textiles - Methods for determining certain aromatic amines derived from azo dyes - Part 3: detection of the use of certain azo dyes likely to release 4-aminoazobenzene
- NF EN ISO 21663:2020 Solid recovered fuels - Methods for determining the carbon (C), hydrogen (H), nitrogen (N) and sulfur (S) content by the instrumental method
- NF B35-309:2011 Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use.
- NF U42-503*NF EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
GSO
- GSO 388:1994 Methods of test for hand-held household hair dryers
- OS GSO 388:1994 Methods of test for hand-held household hair dryers
- GSO ISO 2435:2015 Nitrogen for use in aircraft
- GSO 2404:2014 GASES – MEDICAL NITROGEN GAS –TEST METHODS
- BH GSO 2404:2015 GASES – MEDICAL NITROGEN GAS –TEST METHODS
- GSO ISO 11905-1:2013 Water quality -- Determination of nitrogen -- Part 1: Method using oxidative digestion with peroxodisulfate
- GSO 1149:2002 Test methods of nitrous oxide gas for medical purposes.
GOST
- GOST 2408.2-1975 Brown coals, hard coals, anthracite, combustible shales and turf. Method for thedetermination of nitrogen content
British Standards Institution (BSI)
- BS 7334-4:1992 Measuring instruments for building construction. Methods for determining accuracy in use of theodolites
- BS EN ISO 4787:2011 Laboratory glassware. Volumetric instruments. Methods for testing of capacity and for use
- BS 7334-3:1990 Measuring instruments for building construction. Methods for determining accuracy in use: optical levelling instruments
- BS 7334-5:1992 Measuring instruments for building construction. Methods for determining accuracy in use of optical plumbing instruments
- BS DD CEN/TS 15104:2006 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
- BS EN ISO 21663:2020 Solid recovered fuels. Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
- BS DD CEN/TS 15104:2005 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
- BS EN ISO 20764:2003 Methods of test for petroleum and its products. Petroleum and related products. Preparation of a test portion of high-boiling liquids for the determination of water content. Nitrogen purge method
- BS 7334-6:1992 Measuring instruments for building construction - Methods for determining accuracy in use of laser instruments
- BS 7334-8:1992 Measuring instruments for building construction. Methods for determining accuracy in use of electronic distance-measuring instruments up to 150 m
- BS EN ISO 14362-3:2017 Textiles. Methods for determination of certain aromatic amines derived from azo colorants. Detection of the use of certain azo colorants, which may release 4-aminoazobenzene
- BS 7334-1:1990 Measuring instruments for building construction. Methods for determining accuracy in use: theory
- BS EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- BS EN 14362-3:2012 Textiles. Methods for determination of certain aromatic amines derived from azo colorants. Detection of the use of certain azo colorants, which may release 4-aminoazobenzene
- BS EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- BS EN ISO 14362-1:2017 Textiles. Methods for determination of certain aromatic amines derived from azo colorants. Detection of the use of certain azo colorants accessible with and without extracting the fibres
- BS ISO 14934-2:2013 Fire tests. Calibration and use of heat flux meters. Primary calibration methods
API - American Petroleum Institute
- API 4202-1973 PROGRAM FOR UPGRADING THE NO2 INSTRUMENTATION EMPLOYED IN THE 1972 CHATTANOOGA NO2 EXPOSURE STUDY
- API 26-60051-1973 PROGRAM FOR UPGRADING THE NO2 INSTRUMENTATION EMPLOYED IN THE 1972 CHATTANOOGA NO2 EXPOSURE STUDY - FINAL REPORT
- API 4237-1974 Program for Upgrading the NO2 Instrumentation Employed in the 1972-1973 Chattanooga NO2 Exposure Study - Final Report
SCC
- CEI EN 50436-2:2015 Alcohol interlocks - Test methods and performance requirements Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use
- DANSK DS/EN 50436-2/A1:2014 Alcohol interlocks - Test methods and performance requirements - Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use
- CEI EN 50436-2/A1:2015 Alcohol interlocks - Test methods and performance requirements Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use
- SPI B151.31-2014 Safety Requirements for the Manufacture and Use of Blow Molding Machines
- DANSK DS/EN 50436-2:2014 Alcohol interlocks - Test methods and performance requirements - Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use
- BS DD ISO/TS 12902:2002 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen. Instrumental methods
- BS 1428-B3:1964 Microchemical apparatus. Apparatus for the determination of elements by other than combustion methods.-Specification for nitrogen determination apparatus (non-transference micro-Kjeldahl)
- BS 1428-B1:1953 Microchemical analysis. Apparatus for the determination of elements by other than combustion methods. Specification for nitrogen determination apparatus (micro-Kjeldahl)
- DANSK DS/EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- BS 1428-B1:1964 Microchemical analysis. Apparatus for the determination of elements by other than combustion methods-Specification for nitrogen determination apparatus (micro-Kjeldahl)
- NS-EN 15104:2011 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
- SN-CEN/TS 15104:2005 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
- AENOR UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- DIN CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods; German version CEN/TS 15104:2005
- DANSK DS/CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
- VDI 2453 BLATT 2-2002 Measuring gaseous emissions — Measuring nitrogen monoxide and nitrogen dioxide concentrations — Calibration of NO/NO<sub>x</sub> chemiluminescence measuring devices using gas phase titration
- UNE-CEN/TS 15104:2008 EX Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
- MIL MIL-V-17737F-1981 VALVES, BOILER BLOW, SHIPBOARD USE (SUPERSEDING MIL-V-17737E)
- DANSK DS/ISO 21663:2020 Solid recovered fuels – Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
- DIN EN 15104 E:2010 Draft Document - Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods; German version FprEN 15104:2010
- AENOR UNE-EN 14362-3:2012 Textiles - Methods for determination of certain aromatic amines derived from azo dyes - Part 3: Detection of the use of certain azo dyes, which may release 4-aminoazobenzene
- NS-EN ISO 21663:2020 Solid recovered fuels — Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
- SN-CEN/TS 15750:2008 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- NS-EN 15750:2009 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- SPI B151.15-2003 Extrusion Blowmolding Machines - Safety Requirements for the Manufacture Care and Use
- AS 1683.22:1983 Methods of test for rubber, Method 22: Rubber - Determination of vulcanization characteristics using the oscillating disc curemeter
- AS 2300.1.2.1:1988 Methods of chemical and physical testing for the dairying industry, Method 1.2.1: General methods and principles - Determination of nitrogen - Reference Kjeldahl method
- DANSK DS/EN ISO 20764:2004 Petroleum and related products - Preparation of a test portion of high-boiling liquids for the determination of water content - Nitrogen purge method
- DIN 51732 E:2013 Draft Document - Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
ES-UNE
- UNE-EN 50436-2:2014/A1:2015 Alcohol interlocks - Test methods and performance requirements - Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use (Endorsed by AENOR in April of 2015.)
- UNE-EN 50436-2:2014 Alcohol interlocks - Test methods and performance requirements - Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use (Endorsed by AENOR in March of 2014.)
- UNE-EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
IT-UNI
- UNI EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
Korean Agency for Technology and Standards (KATS)
- KS M ISO 20764-2004(2019) Petroleum and related products-Preparation of a test portion of high-boiling liquids for the determination of water content-Nitrogen purge method
- KS M ISO 15672-2007(2022) Rubber and rubber additives-Determination of total nitrogen content using an automatic analyser
- KS D 2555-2020 Determination of nitrogen in tantalum
- KS M 6695-2016(2021) Testing method of crack growth using Demattia flex-cracking apparatus
- KS M 6695-1984 Testing method of crack growth using Demattia flex-cracking apparatus
- KS M 6695-2021 Testing method of crack growth using Demattia flex-cracking apparatus
- KS M 6695-2016 Testing method of crack growth using Demattia flex-cracking apparatus
- KS M 2418-2006 Standard test method for instrumental determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants
- KS B 5648-2022 Pressure test method and vacuum vessel leak detection methodusing mass spectrometer
- KS B 5648-2002(2022) Pressure test method and vacuum vessel leak detection methodusing mass spectrometer
- KS L ISO 4787:2016 Laboratory glassware-Volumetric glassware-Methods for use and testing of capacity
- KS L ISO 4787:2006 Laboratory glassware-Volumetric glassware-Methods for use and testing of capacity
IN-BIS
- IS 5194-1969 Determination method of nitrogen-Kjeldahl method
ANSI - American National Standards Institute
- B151.4-1999 Plastic Blown Film Machinery - Manufacture@ Care & Use (SPI)
Standard Association of Australia (SAA)
- AS 3580.5.1:2023 Methods for sampling and analysis of ambient air, Method 5.1: Determination of oxides of nitrogen — Direct-reading instrumental method
- AS 3580.5.1:2011 Methods for sampling and analyzing ambient air. Direct-reading instrument method for determination of nitrogen oxides.
German Institute for Standardization
- DIN EN 50436-2:2008 Alcohol interlocks - Test methods and performance requirements - Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use; German version EN 50436-2:2007
- DIN EN 15750:2010-02 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
- DIN EN ISO 21663:2021-03 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020); German version EN ISO 21663:2020
- DIN 51732:2014-07 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
- DIN EN ISO 20764:2004-02 Petroleum and related products - Preparation of a test portion of high-boiling liquids for the determination of water content - Nitrogen purge method (ISO 20764:2003); German version EN ISO 20764:2003
- DIN CEN/TS 15750:2008 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version CEN/TS 15750:2008
Danish Standards Foundation
- DS/ISO 21663:2020 Solid recovered fuels – Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
- DS/EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- DS/EN ISO 11905-1:2001 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate
Lithuanian Standards Office
- LST EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
- LST EN 15750-2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
AT-ON
- OENORM EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
European Committee for Standardization (CEN)
- EN ISO 21663:2020 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
- EN ISO 4787:2010 Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use
- EN ISO 4787:2021 Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of capacity and for use (ISO 4787:2021)
- PD CEN/TS 15750:2008 Fertilizers - Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
- EN ISO 4787:2011 Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use (ISO 4787:2010, Corrected version 2010-06-15)
CH-SNV
- SN EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
HU-MSZT
- MSZ 8880/2.lap-1963 Electrical product testing tools and testing methods. Use instruments
Indonesia Standards
- SNI 19-1498-1989 Continuous NO and NO2 test apparatus in exhaust-gases
- SNI 4146-2013 Method for determination of total nitrogen content in sediment by Kjeldahl titration method
AENOR
- UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
International Organization for Standardization (ISO)
- ISO 21663:2020 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method
- ISO 4787:2010 Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use
American National Standards Institute (ANSI)
- ANSI/SPI B151.31-2014 Safety Requirements for the Manufacture and Use of Blow Molding Machines
- ANSI/SPI B151.15-2003 Extrusion Blow Molding Machines, Construction, Care, and Use of
U.S. Military Regulations and Norms
- ARMY MIL-R-48664 B-1993 RESTRAINT SYSTEMS, AMMUNITION (USING BLOW MOLDED PLASTIC DIVIDERS)
Japanese Industrial Standards Committee (JISC)
- JIS B 7982:1995 Continuous analyzers for oxides of nitrogen in flue gas
VN-TCVN
- TCVN 7619-1-2007 Textiles.Methods for the determination of certain aromatic amines derived from azo colorants.Part 1: Detection of the use of certain azo colorants accessible without extraction
The use of nitrogen blowing instrument,Use of nitrogen blowing instrument,How to use nitrogen blowing instrument,Use of nitrogen blowing instrument