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电子测量仪器内石英晶体振荡器
Verification Regulation of Crystal Oscillators inside the Electrical Measuring Instruments
价格：￥0.00
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电子计数器内石英晶体振荡器试行检定规程
价格：￥0.00
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原子时标基准操作技术规范
Operating Technical Norm of Atomic Time Scale Primary Standard
价格：￥0.00
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Cs-Ⅲ铯原子束时间频率基准操作技术规范
Operating Technical Norm of the Cs-sⅢ Cesium Atom Beam Time Frequency Primary Standard
价格：￥0.00
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