db/t 21

db/t 21, Total:200 items.

The international standard classification for "db/t 21" includes: .

The Chinese standard classification for "db/t 21" includes: .

Professional Standard - Earthquake

DB/T 21-2007 Technical requirements of instruments in network for earthquake monitoring.The description of common technical parmneter and test method

Liaoning Provincial Standard of the People's Republic of China

DB21/T 1222.3-2021 Technical regulations for green prevention and control of major vegetable pests and diseases Part 3: Cucumber
DB21/T 4197-2025 Wireless digital video links operating in the 1.3 GHz to 50 GHz band; Harmonized standards for radio spectrum access
DB21/T 3755-2023 Technical regulations for restoration of degraded Chinese pine plantation
DB21/T 4403-2026 Norms for Evaluating Window Service of Medical Insurance Administration Institutions
DB21/T 3768-2023 Technical specifications for the production of eggs without antibiotics
DB21/T 3900-2023 Technical specifications for surface coalbed methane drainage in goaf areas of coal mines
DB21/T 4296-2025 Geographical Indication Product Chaoyang Mung Bean
DB21/T 3491-2021 Technical specification for fattening of beef cattle
DB21/T 1712.4-2025 Information Engineering Supervision Implementation Methods Part 4: Software Engineering
DB21/T 3342-2020 Undergrowth Ganoderma Cultivation Technical Regulations
DB21/T 3690.2-2023 Donkey Slaughtering Quality and Safety Control Technical Specifications Part 2: Slaughtering and Quarantine
DB21/T 3709-2023 12345 Government Service Convenience Hotline Management and Service Specifications
DB21/T 1455.6-2008 Polar Orbiting Satellite Remote Sensing Monitoring Part 6 Heavy Fog
DB21/T 4144-2025 Heavy rain disaster survey and risk assessment zoning
DB21/T 4096-2024 Technical Specification for Risk Investigation of Occupational Health Hazards
DB21/T 3585-2022 Cultivation technical regulation of shiitake mushroom
DB21/T 3711-2023 Technical specification for identification of Huanrenshan ginseng powder
DB21/T 4011-2024 Industrial Network Security Situation Awareness Technical Specifications
DB21/T 3601.8-2023 Agricultural Machinery Operation Series Technical Regulations Part 8: Dual-shaft Stubble Cutter Rotary Tiller
DB21/T 3728.1-2023 Competency Evaluation Requirements for Primary Vocational Skilled Personnel of Information Technology Part 1: General Requirements
DB21/T 3601.2-2022 Agricultural Machinery Operation Series Technical Regulations Part 2: Subsoiler Operation Technical Regulations
DB21/T 3467-2021 Interoperability specification for integrated radio management platform
DB21/T 3561-2021 Tissue culture technical regulation of white wax lobularis
DB21/T 3482-2021 Technical specifications for direct combustion of central heating with baled straw in villages and towns
DB21/T 4193.3-2025 Safety Technical Practical Assessment Standards for Special Operations - Part 3: Chlorination Process Operations
DB21/T 4193.5-2025 Special Operations Safety Technology Practical Operation Assessment Specifications Part 5: Cracking (Cracking) Process Operation
DB21/T 1788-2025 Weather Indices for Highway Traffic Safety Operations
DB21/T 3722.1-2023 Guidelines for High Standard Farmland Construction Part 1: Compilation of Project Preliminary Design Report
DB21/T 3549-2021 Technical regulations for ecological planting of ginseng under forest
DB21/T 1454.4-2008 Meteorological Hazard Assessment Part 4 Frost
DB21/T 3454-2021 Technical Specifications for Salt-tolerant Cultivation of Rice
DB21/T 3131-2023 Enterprise product standard evaluation specification
DB21/T 4334.2-2025 Service Specifications for Public Digital Cultural Platform - Part 2: Data Resources
DB21/T 3285-2020 Determination of selenium and its compounds in waste gas from stationary pollution sources by atomic fluorescence method
DB21/T 3676-2022 Technical Regulations for Pear Dense Planting and Early Harvest Production
DB21/T 1019-2023 Scope of archiving of township documents and materials and retention period of files
DB21/T 1163-1999 Forest pest and disease prediction, prevention, quarantine and pesticide application technology
DB21/T 1799.3-2019 Information Technology Information Service Management Specification Part 3: IT System Operation and Maintenance
DB21/T 2056-2020 Cultivation technical regulation of Actinidia jujube
DB21/T 2176.4-2023 Port ship declaration electronic data exchange part 4: berthing plan message
DB21/T 3480-2021 Technical regulations for donkey feeding and management in western Liaoning
DB21/T 1628.3-2026 Information Security Technology - Personal Information Security - Part 3: Guidelines for the Management of Personal Information Databases
DB21/T 3852.5-2025 Technical Regulations for Vegetable Factory Seedling Production - Part 5: Cucumber
DB21/T 3100-2018 VHF frequency band radio station (station) electromagnetic environment test specification
DB21/T 3249-2020 Facility Blueberry Cultivation Technical Regulations
DB21/T 3757-2023 Applied System Engineering Engineering Cost Consulting Specifications
DB21/T 1576-2020 Digital Forestry Forest Zoning Code
DB21/T 1591-2020 Data Table Structure of Forest Resource Survey in Digital Forestry Database
DB21/T 3601.5-2022 Agricultural Machinery Operation Series Technical Regulations Part 5: Film Mulching Machine Operation Technical Regulations
DB21/T 3097-2018 Software development specification for integrated radio management platform
DB21/T 4077-2024 Merkur farm epidemic prevention technical regulations
DB21/T 4291-2025 Geographical Indication Product FuJia Peanut
DB21/T 3560-2021 Technical regulations for transplanting and producing ginseng under the forest
DB21/T 3889-2023 Meteorological suitability level for ice and snow tourism
DB21/T 4109-2025 Guidelines for inter-laboratory comparisons for manufacturers
DB21/T 3131-2025 Enterprise Product Standard Evaluation Specification
DB21/T 3246-2020 Light and simplified production technical regulations for table grapes
DB21/T 3212-2019 Technical Regulations for Selecting Excellent Trees of Juglans Catalpa
DB21/T 4131-2025 Special equipment safety data element causes of lifting machinery accidents
DB21/T 3338-2020 Technical Regulations for the Cultivation of High Quality Timber in Secondary Forest of Quercus mongolica
DB21/T 3794-2023 DNA barcoding method for water quality benthic identification
DB21/T 3224-2020 Technical Specifications for Size Evaluation of Liaoyu White Reserve Bulls
DB21/T 3347-2020 Technical regulations for green production of corn with nitrogen reduction and efficiency enhancement
DB21/T 1719-2009 Quality and Safety of Agricultural Products Technical Specifications for Chinese Eriocheir Crab Breeding in Rice Fields
DB21/T 3439-2021 Technical method for evaluating the utilization efficiency of light and heat resources in food crops
DB21/T 1847-2025 Technical Specifications for Hot In-Plant Recycled Asphalt Pavement
DB21/T 3368-2021 Offshore Disaster-caused Jellyfish Monitoring Survey and Biomass Assessment Technical Regulations
DB21/T 3468-2021 Integrated radio management platform geographic information platform integration specification
DB21/T 3416.5-2024 Green production technology regulations for greenhouse vegetables Part 5: Melon
DB21/T 2350-2024 Technical specification for water treatment in industrial recirculating aquaculture system for marine fish
DB21/T 3483-2021 Technical regulations for high-yield cultivation of rice straw wet harrowing in autumn
DB21/T 4326-2025 Rural Water Supply Project Operation and Management Specifications
DB21/T 3277-2020 Technical Regulations for Cultivation of Large-diameter Woods of Korean Pine
DB21/T 3864-2023 Technical Specifications for Supervision and Inspection of Lightning Protection in Explosion and Fire Hazardous Places
DB21/T 1222.8-2021 Technical Regulations for Green Prevention and Control of Major Vegetable Pests and Diseases Part 8: Zucchini
DB21/T 3106-2019 Technical regulations for risk assessment and forecast of overwintering injury of fast-growing poplar
DB21/T 3128-2019 Sweet potato storage and transportation technical regulations
DB21/T 4085-2025 Guidelines for greenhouse gas emission accounting and reporting in the automotive industry
DB21/T 4230-2025 Geographical Indication Product Zhangzi Island Sea Cucumber
DB21/T 1628.5-2014 Information Security Part 5: Personal Information Security Risk Management Guidelines
DB21/T 3393-2021 Construction hoist safety risk assessment procedures
DB21/T 3117-2019 Standards for Construction Quality Inspection and Evaluation of Water Conservancy Engineering Unit Projects—Water Conveyance Pipeline Engineering
DB21/T 2133-2025 Technical regulations for the production of cut chrysanthemums in facilities
DB21/T 3157-2019 Measuring method of double-color distribution ratio of yellow/green combined color insulated wire core
DB21/T 4071-2024 Pavement Regeneration Aggregate Application Technical Regulations
DB21/T 2320-2024 Feed and Feed Additives Production Enterprise Laboratory Construction Specifications
DB21/T 3727-2023 General Rules for Facial Recognition
DB21/T 2800.21-2017 Agricultural Socialization Service Part 21: Service Specifications for Fruit and Vegetable Industry
DB21/T 3485-2021 Drawing method of container inspection and test report with drawings
DB21/T 3595-2022 Level of Ground Ozone Concentration
DB21/T 2702.6-2019 Information Security Personal Information Security Management System Evaluation Part 6: Qualification Review
DB21/T 3868-2023 Cloud computing professional skills talent training and evaluation standards
DB21/T 4078.6-2024 Invasive Plant Monitoring Technical Regulations - Part 6: Impatiens capensis
DB21/T 3601.3-2022 Agricultural Machinery Operation Series Technical Regulations Part 3: Rice Combine Harvester Operation Technical Regulations
DB21/T 3433-2021 Technical Regulations for Selecting Excellent Trees of Larix
DB21/T 4319-2025 Technical Regulations for Satellite Remote Sensing Monitoring of Green Tides
DB21/T 3314-2020 Technical Regulations for Direct Return of Biochar to Field
DB21/T 3233.2-2020 Electronic document message standard for ro-ro passenger ship information Part 2: Ticket dynamic information
DB21/T 3872-2023 Technical Specifications for Base Grouting Reinforcement of Highway Maintenance Projects
DB21/T 3805-2023 Technical regulations for strawberry seedling breeding
DB21/T 3684-2022 Pocket-type Cultivation Technical Regulations of Black Fungus under Forest
DB21/T 2613-2025 Railway Traffic Safety Operation Meteorological Indicators
DB21/T 20012-2024 Technical Specification for Grouting Reinforcement of Subbase in Road Maintenance Engineering
DB21/T 3481-2021 Breed characteristics and grade evaluation of big-bone chicken
DB21/T 3615-2022 Regulations for the Construction of Beautiful Rural Elderly Care Institutions
DB21/T 3320-2020 Biochar Labeling Specifications
DB21/T 3611-2022 Production technical regulations for efficient utilization of water and fertilizer in alfalfa artificial turf
DB21/T 1672-2019 Technical specification for paddy field rotary tillage
DB21/T 3298-2020 Special equipment technical file management specification
DB21/T 3834.2-2023 Technical Specifications for Quality Evaluation of Agricultural Machinery Part 2: Banking Machine
DB21/T 3229-2020 Technical regulations for the prevention and control of elm jumping elephant
DB21/T 3556-2021 National Reserve Forest Afforestation Technical Regulations
DB21/T 4024-2024 Technical requirements for mobile terminal collection of TCM tongue information
DB21/T 4376-2026 Norms for the Construction of a Digital Management Platform for Carbon Neutrality
DB21/T 1582-2019 Distribution map of digital forestry mapping
DB21/T 3370-2021 Technical specifications for evaluating the effect of portunus trituberculatus multiplication and release
DB21/T 4129-2025 Specification for the Collection of Defect Information on Consumer Products
DB21/T 3729-2023 Big data application industry classification specification
DB21/T 3525-2021 Technical regulations for plant protection drones to drop Trichogramma to control corn borer
DB21/T 3358-2020 Elevator regenerative braking system requirements and test methods
DB21/T 4192-2025 Technical Specifications for Cleaning, Disinfection of Livestock and Poultry Transportation Vehicles and Evaluation of Disinfection Effect
DB21/T 4061-2024 Egg chicken and cockerel fattening technology standards
DB21/T 3085-2018 Determination of formamide residues in foamed plastics and their products Gas chromatography-mass spectrometry
DB21/T 3817-2023 Fruit tree production vocational skill level
DB21/T 3264-2020 Construction quality and acceptance specification of village and town water supply projects in Liaoning Province
DB21/T 3171-2019 Appraisal and Appraisal of Shuhua Jade
DB21/T 4349-2025 Operation and Management Regulations for Small Sluice Projects
DB21/T 2020-2024 Planting Technology Regulations for Larch-Dynema Mixed Layer Forests
DB21/T 2176.3-2023 Port ship declaration electronic data exchange Part 3: Berth application message
DB21/T 20005-2024 Technical Regulations for the Utilization of Topsoil from Cultivated Land Affected by Construction Projects
DB21/T 1799.1-2019 Information Technology Information Service Management Specification Part 1: General Provisions
DB21/T 3759-2023 Applied systems engineering key evaluation index
DB21/T 3973-2024 Technical regulations for comprehensive management of closed open pit coal mines
DB21/T 1992-2025 Technical regulations for the operation of light and small sprinkler irrigation machines
DB21/T 3223-2020 Technical Regulations for Epidemic Prevention of Bull Breeding Farms in Liaoning Province
DB21/T 3852.1-2023 Technical Regulations for Vegetable Factory Seedling Breeding Part 1: General Principles
DB21/T 3831-2023 Technical specifications for off-site law enforcement system for highway and bridge traffic safety in Liaoning Province
DB21/T 4179-2025 Comprehensive Population Database Metadata Specification
DB21/T 2009-2025 Technical Specifications for Swine Fever Eradication in Commercial Pig Farms
DB21/T 3498-2021 Technical regulations for the cultivation of black soil with thick and fertile plowing layer
DB21/T 3547-2021 Technical Regulations for Protected Cultivation of Actinidia jujube
DB21/T 3444-2021 old jade grading
DB21/T 3578-2022 Elevator IoT System Technical Requirements
DB21/T 3543-2021 Liaoning Province Health Food Management Regulations
DB21/T 3120-2019 Molecular Identification of Aquatic Animal Species by COI and 16S rRNA Molecular Marker
DB21/T 2401-2025 Technical Regulations for Walnut Cultivation
DB21/T 4345-2025 Standard for Customized Shuttle Bus Passenger Transport Services
DB21/T 3456-2021 Technical Regulations for High Quality Japonica Rice Production
DB21/T 2176.1-2023 Port Vessel Declaration Electronic Data Exchange Part 1: Terms and Definitions
DB21/T 3521-2021 ETC Smart Parking Lot Sign Requirements
DB21/T 3848-2023 Standards for identification of germplasm of shrimp E. sinensis
DB21/T 3893-2023 Industrial data circulation data cleaning specifications
DB21/T 4023-2024 Technical regulations for sweet cherry seedling breeding
DB21/T 2008-2025 Technical Specifications for the Prevention and Control of Porcine Parvovirus
DB21/T 4182-2025 Technical Specifications for Afforestation on Clayey Coastlines
DB21/T 2624-2016 Quality and safety control specifications for chestnut regional bases for export
DB21/T 4360-2025 Specification for Automated Decoction Services
DB21/T 3375-2021 Technical regulation of feed nutrition for big bone chicken
DB21/T 3660-2022 Information system penetration testing technical specification
DB21/T 3126-2019 Technical regulations for high-quality production of greenhouse tomatoes
DB21/T 3232.3-2020 Container Electronic Document Message Standard Part 3: Tally List
DB21/T 1455.4-2022 Polar Orbiting Satellite Remote Sensing Monitoring Part 4: Forest Fires
DB21/T 3083-2018 Detection method of various pesticide residues in raw cotton
DB21/T 3162-2019 Corn drip irrigation engineering technology and management regulations
DB21/T 4130-2025 Specification for post-accident assessment of special equipment
DB21/T 3996.3-2024 Technical regulations for the control of major weeds in farmland Part 3: Transplanted rice fields
DB21/T 3227-2020 Technical Regulations for the Control of Japanese Red Scale
DB21/T 4333-2025 Service Quality Standards for Home Cleaning Services
DB21/T 3986-2024 High-value patent valuation standards
DB21/T 3396-2021 Technical regulations for planting celery under forest in Liaodong mountainous area
DB21/T 2364-2019 Technical regulations for postharvest treatment of broccoli
DB21/T 3335-2020 Ginkgo seedling grafting technical regulations
DB21/T 3414-2021 Regulations for the establishment of quotas for flood control material reserves in Liaoning Province
DB21/T 3228-2020 Technical regulations for the control of elm phoenix moth

Guangdong Provincial Standard of the People's Republic of China

DB4401/T 21-2019 Classification and assessment of tourism homestay
DB4412/T 21-2022 Technical Regulations for Standardized Park Construction in Gonggan Mountains, Deqing
DB4404/T 21-2022 Standards for the rating of community elderly care services
DB4408/T 21-2023 A guide to famous aquatic Zhanjiang dishes
DB4403/T 21-2019 Homestay Service Specifications

Shandong Provincial Standard of the People's Republic of China

DB3707/T 21-2019 Weifang Broiler Industry Chain Management Standards
DB3717/T 21-2023 Geographical indication product Mengtai Banquet Wine

Inner Mongolia Provincial Standard of the People's Republic of China

DB1505/T 21-2024 Medical insurance agency fund work specifications

Fujian Provincial Standard of the People's Republic of China

DB3505/T 21-2024 Fujian Cypress Large-Diameter Timber Cultivation Technical Regulations

Hubei Provincial Standard of the People's Republic of China

DB4209/T 21-2021 Geographical Indication Product Guanyin Lake Green Tea

Shaanxi Provincial Standard of the People's Republic of China

DB6108/T 21-2021 Cultivation Technical Regulations for Commercial Potatoes in Sandy Land

Shanxi Provincial Standard of the People's Republic of China

DB1402/T 21-2024 Technical Specifications for Fitting Glasses Enterprises
DB1411/T 21-2022 Technical Regulations for Open Field Tomato Production
DB1404/T 21-2021 UVC LED disinfection product safety operating procedures

Hainan Provincial Standard of the People's Republic of China

DB4602/T 21-2024 Specifications for low-altitude tourism services

Sichuan Provincial Standard of the People's Republic of China

DB5133/T 21-2019 Highland barley original seed and improved seed breeding technical regulations
DB5103/T 21-2020 Rongxian clay pottery production technical specification
DB5111/T 21-2021 Technical specification for the production and processing of geographical indication product Emeishan snow konjac
DB5118/T 21-2021 Technical Specifications for Planting Malan in Lushan County
DB5115/T 21-2020 Public toilet operation management specification

Yunnan Provincial Standard of the People's Republic of China

DB5306/T 21-2019 Zhaotong City Rice Field Fish Farming Technical Specifications

Guizhou Provincial Standard of the People's Republic of China

DB5206/T 21-2018 Technical Regulations for Processing of Fanjingshan Straight Maofeng Green Tea

Military Standards (MIL-STD)

MIL MIL-T-55164/21A-1988 TERMINAL BOARDS, MOLDED, BARRIER STUD TYPE, CLASS 17TB (S/S BY A-A-59125/21) (SUPERSEDING MIL-T-55164/21)
MIL MIL-T-55155/21B-1990 TERMINALS, STUD (INSULATED), STYLE SE21 (S/S BY A-A-59126/21) (SUPERSEDING MIL-T-55155/21A)

International Telecommunication Union (ITU)

ITU-T K Supplement 21-2021 ITU-T K.21 - Rationale for setting resistibility requirements of telecommunication equipment installed in customer premises against lightning

Others: db21/t+,db34+t+,db/t1420,db/t2704,DB/T 21-2007,hj/t 21,db34/t,db51/t,hj/t+21,db37t+,db/t2918,db/t402,db/t2882,db/t 21,db42/t,db 51/t,db/t 10,DB21/T-3362,DB21/T2815-2017