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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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forest fire cycle period
forest fire detection
forest fire disasters in China
forest fire ecology
forest fire environment
forest firefighting equipment
forest fire fighting vehicle
forest fire management
forest fire monitoring by remote sensing
forest fire monitoring system
forest fire prediction
forest fire prevention
forest fire pump
forest fire suppression
forest fire warning system
forest floor decomposition
forest food
forest-forest steppe faunal group of temperate zone in China
forest for sand fixation
forest for soil and water conservation
forest for special purpose
forest for water resources conservation
forest fragmentation
forest frog's oviduct
forest fuel
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更新时间:2026/7/9 11:03:45