组合使用关键词、标准类型、状态与 ICS 分类，快速定位所需国家标准。
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GB/T 18216.3-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 3: Loop impedance
GB/T 18216.2-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 2: Insulation resistance
GB/T 18216.1-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 1: General requirements
GB/T 6092-2021
Squares
GB/T 26667-2021
Terminology for electromagnetic shielding materials
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 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 39865-2021
Method for measuring refractive index of uniaxial optical crystals
GB/T 39853.2-2021
Power quality measurement in power supply systems—Part 2: Functional tests and uncertainty requirements
GB/T 39853.1-2021
Power quality measurement in power supply systems—Part 1: Power quality instruments (PQI)
GB/T 39843-2021
Electronic characteristic measurements—Local critical current density and its distribution in large-area superconducting films
GB/T 17215.221-2021
Electricity metering equipment(a.c.)—General requirements, tests and test conditions—Part 21:Tariff and load control equipment
GB/T 39724-2020
Technical specifications and testing methods for cesium atomic clock
GB/T 39588-2020
Requirements and test methods for electrostatic shielding packaging bags
GB/T 24635.1-2020
Geometrical product specifications (GPS)—Coordinate measuring machines (CMM): Technique for determining the uncertainty of measurement—Part 1: Overview and metrological characteristics
GB/T 39547-2020
Design and metrological characteristics of mechanical dial gauges
GB/T 39585-2020
Opto-electronic measurement—Performance requirements and test methods of light distribution measurement system
GB/T 39543-2020
Design and metrological characteristics of dial test indicators（lever type）
GB/T 25897-2020
Residual resistance ratio measurement—Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors