Aperture a

Aperture a, Total:43 items.

The international standard classification for "Aperture a" includes: Photographic equipment. Projectors , Analytical chemistry in general , Geotextiles , Ceramic products , Laboratory ware and related apparatus , Textile fabrics , Other standards related to analytical chemistry , Microbiology of water , Coals , Particle size analysis. sieving , Powder metallurgy , Rubber compounding ingredients , Refractories .

The Chinese standard classification for "Aperture a" includes: Lens , Separating machinery , Other textile articles , Special ceramics , Daily use glass products , Textile articles in general , Coal analysis methods , Sieving, Sieve Plate and Sieve Screen , Basic standards and general methods , Powder metallurgy analysis method , Carbon black , Fireproof material in general , Length Measurement , Basic standards and general methods for chemical additive .

Professional Standard - Machinery

JB/T 7384.16-1994 Fasteners Plug gauges for bore size of rivets
JB/T 8997.1-1999 Machine spools with large bore for processing of electric wires and cables Part 1:General requirements
JB/T 8248.2-1999 Method for measurement for effective aperture and relative aperture of camera lenses
JB/T 7384.18-1994 Fasteners Gauges for bore diameter of gaskets
JB/T 8997.1-2013 Machine spools with large bore for processing of wires and cables - Part 1: General
JB/T 8997.2-1999 Machine spools with large bore for processing of electric wires and cables Part 2:Steel plate welded machine spools

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 11415-1989 Laboratory sintered(fritted) filters-Porosity grading, classification and designation
GB/T 5249-2013 Permeable sintered metal materials—Determination of bubble test pore size
GB/T 21650.1-2008 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 1: Mercury porosimetry
GB/T 45528-2025 Nanotechnology—Measurement of pore size and pore size distribution of nanoporous materials—Fluorescence probe method
GB/T 14799-2024 Geosynthetics—Determination of the effective opening size—Dry sieving method
GB/T 17634-1998 Geotextiles and geotextile-related products - Determination of the characteristic opening size-Wet sieving method
GB/T 21650.2-2008 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 2: Analysis of mesopores and macropores by gas adsorption
GB/T 24219-2009 Determination of ebullition aperture of woven filtering fabric
GB/T 1967-1996 Test method for pore diameter of porous ceramic
GB/T 28600-2012 Rubber compounding ingredients—Silica,precipitated,hydrated—Determination of average pore diameter
GB/T 14799-2005 Geotextiles and geotextile-related prudcts— Determination of the effective opening size— Dry sieving method
GB/T 5249-1985 Permeable sintered metal materials--Determination of bubble test pore size
GB/T 2679.14-1996 Filter paper and filterboard--Determination of maximum pore diameter
GB/T 42269-2022 Determination of pore size for membranes—Gas permeation method
GB/T 21650.3-2011 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption—Part 3:Analysis of micropores by gas adsorption
GB/T 32361-2015 Test methods for pore size properties of membrane filters—Bubble point and mean flow pore test
GB/T 38516-2020 Permeable sintered metal materials—Determination of average pore size of medium flow
GB/T 38949-2020 Determination of pore size for porous membranes—Standard particle method
GB/T 893.1-1986 Circlips for holes--Type A
GB/T 42035-2022 Determination of pore size distribution of coal and rock—Nuclear magnetic resonance
GB/T 14799-1993 Geotextiles－Determining apparent opening size of a geotextile by sieving

Professional Standard - Ferrous Metallurgy

YB/T 6270-2024 Determination of pore size distribution using mercury intrusion porosimetry
YB/T 118-1997 Test method for pore size distribution of refractory

Professional Standard - Railway

TB/T 1697-1985 Railway Culvert Aperture Series

Professional Standard - Ocean

HY/T 038-1995 GTL-D Membrane Pore Size Meter

National Metrological Verification Regulations of the People's Republic of China

JJG 467-1986 Precision Bore Diameter Measuring Instrument

Professional Standard - Electron

SJ 2667-1986 Methods of measurement of numerical aperture of optical fibres and cables

Group Standards of the People's Republic of China

T/GDNA 004-2021 Textile – Test method for pore size characteristics gas-liquid replacement method

Hebei Provincial Standard of the People's Republic of China

DB13/T 2768.4-2018 Graphene powder material detection method part 4: specific surface area, pore volume and pore diameter BET method

Professional Standard - Petrochemical Industry

SH/T 0572-1993 Calculation method for catalyst pore size distribution (nitrogen desorption constant temperature line calculation method)

Professional Standard - Petroleum

SY/T 6154-1995 Determination for rock specific surface area and pore size distribution - Static nitrogen absorption volumetric method

Professional Standard - Energy

NB/T 11635-2024 Determination method for effective emission radius of coal seam methane emission boreholes

Professional Standard - Surveying and Mapping

CH/T 3010-2012 Specifications for aerial photography of 1: 50000 topographic maps by airborne synthetic aperture radar

German Institute for Standardization

DIN 66139:2012-03 Pore size analysis - Representation of pore size distributions / Note: To be replaced by DIN 66139 (2022-12).
DIN 66139 E:2010-02 Pore size analysis - Representation of pore size distributions
DIN 66139:2022-12 Pore size analysis - Representation of pore size distributions / Note: Date of issue 2022-11-18*Intended as replacement for DIN 66139 (2012-03).
DIN 66139:2012 Pore size analysis - Representation of pore size distributions