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fountain clock steered time scale
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fountain clock steered time scale
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fountain clock steered time scale
喷泉钟驾驭时标
结合喷泉钟高准确度和商品原子钟组的稳定性与可靠性,产生高准确、稳定、可靠时间频率信号的技术方案。国际计量局(BIPM)使用这种方案计算产生出国际标准时间(UTC)。
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Conservation Plan of Shenyang Historic City
Conservation Plan of Shexian Historic City
Conservation Plan of Shigatse Historic City
Conservation Plan of Suzhou Historic City
Conservation Plan of Tianjin Historic City
Conservation Plan of Tonghai Historic City
Conservation Plan of Weishan Historic City
Conservation Plan of Wenzhou Historic City
Conservation Plan of Wuhan Historic City
Conservation Plan of Xi’an Historic City
Conservation Plan of Yangzhou Historic City
Conservation Plan of Yantai Historic City
Conservation Plan of Yellow Crane Tower and Its Surrounding Areas
Conservation Plan of Yining Historic City
Conservation Plan of Zhengding Historic City
Conservation Plan of Zhenyuan Historic City
Conservation Plan of Zhongshan Historic City
Conservation Plan of Zigong Historic City
Conservation Plan of “Three Mountains and Five Imperial Gardens” Historic City
conservation principle of machinery energy
conservation priorities coefficient
conservation project of Beijing forbidden city
Conservation Project of Bogd Khaan Palace Museum of Mongolia
conservation project of Cave 85 at Mogao Grottoes
conservation project of Hangzhou Liuhe Pagoda
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