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非接触式测距测速仪校准规范
Calibration Specification for Non-contact Ranging Speedometer
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频标比对器检定规程
Frequency Comparators
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微波频率计数器检定规程
Verification Regulation of Microwave Frequency Couters
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单机型和集中管理分散计费型电话 计时计费器型式评价大纲
The Program for Pattern Evaluation of Single and Dispersion Controled Centrely Telephone Accounter
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秒表检定规程
Verification Regulation of Stopwatches
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时间继电器测试仪校准规范
Calibration Specification for Time Relay Testers
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铷原子频率标准检定规程
Verification Regulation of Rubidium Atomic Frequency Standards
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