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GB/T 19346.3-2021
Methods of measurement of amorphous and nanocrystalline alloys—Part 3： AC magnetic properties of Fe-based amorphous strip using a single sheet specimen
GB/T 18643-2021
Diagnostic techniques for Marek‘s disease
GB/T 18642-2021
Diagnostic techniques for Trichinella spp.
GB/T 17651.2-2021
Measurement of smoke density of cables or optical fiber cables burning under defined conditions—Part 2: Test procedure and requirements
GB/T 17651.1-2021
Measurement of smoke density of cables or optical fiber cables burning under defined conditions—Part 1: Test apparatus
GB/T 17650.2-2021
Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 2: Determination of acidity (by pH measurement) and conductivity
GB/T 17650.1-2021
Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 1：Determination of the halogen acid gas content
GB/T 17215.321-2021
Electricity metering equipment (AC)—Particular requirements—Part 21：Static meters for active energy(classes A, B, C, D and E)
GB/T 17215.211-2021
Electricity metering equipment(AC)—General requirements, tests and test conditions—Part 11：Metering equipment
GB/T 16895.32-2021
Low voltage electrical installations—Part 7-712: Requirements for special installations or locations—Solar photovoltaic (PV) power supply systems
GB/T 15972.54-2021
Specifications for optical fibre test methods—Part 54: Measurement methods and test procedures for environmental characteristics—Gamma irradiation
GB/T 15972.45-2021
Specifications for optical fibre test methods—Part 45：Measurement methods and test procedures for transmission characteristics—Mode field diameter
GB/T 15972.43-2021
Specifications for optical fibre test methods—Part 43: Measurement methods and test procedures for transmission characteristics—Numerical aperture
GB/T 15972.42-2021
Specifications for optical fibre test methods—Part 42: Measurement methods and test procedures for transmission characteristics—Chromatic dispersion
GB/T 15972.41-2021
Specifications for optical fibre test methods—Part 41: Measurement methods and test procedures for transmission characteristics—Bandwidth
GB/T 15972.34-2021
Specifications for optical fibre test methods—Part 34: Measurement methods and test procedures for mechanical characteristics—Fibre curl
GB/T 15972.30-2021
Specifications for optical fibre test methods—Part 30: Measurement methods and test procedures for mechanical characteristics—Fibre proof test
GB/T 15972.20-2021
Specifications for optical fibre test methods—Part 20: Measurement methods and test procedures for dimensions—Fibre geometry
GB/T 15972.10-2021
Specifications for optical fibre test methods—Part 10: Measurement methods and test procedures—General and guidance
GB/T 15911-2021
Monitoring and testing method for energy saving of industrial electroheat devices
