GB/T 4854.3-2022
声学 校准测听设备的基准零级 第3部分: 骨振器纯音基准等效阈振动力级
Acoustics—Reference zero for the calibration of audiometric equipment—Part 3:Reference equivalent threshold vibratory force levels for pure tones and bone vibrators
- 实施日期
- 2022-10-01
- ICS 分类
- 17.140
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 4854.3-2022
Acoustics—Reference zero for the calibration of audiometric equipment—Part 3:Reference equivalent threshold vibratory force levels for pure tones and bone vibrators
GB/T 17248.1-2022
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GB/Z 17215.611-2021
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Electricity metering data exchange—The DLMS/COSEM suite—Part 73: Wired and wireless M-Bus communication profiles for local and neighbourhood networks
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Metric series wires for measuring screw threads
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GB/Z 40842-2021
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GB/T 10919-2021
Gauges for straight-sided splines
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Electricity metering equipment(AC)—General requirements, tests and test conditions—Part 31:Product safety requirements and tests
GB/T 30433-2021
Standard column used for evaluating liquid chromatograph
GB/T 40678-2021
General specification for PXI bus modules