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cesium clock
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cesium clock
Encyclopedia
工学
频率标准
释
cesium clock
铯钟
利用铯(133Cs)原子基态两个超精细能级间跃迁作为频率参考(在不受外场干扰的条件下,频率为9.192631770吉赫),通过锁定环路锁定晶体振荡器,使晶体振荡器能够输出高稳定度和高准确度时间频率信号的原子钟。采用的工作原子为铯原子,又称铯原子频率标准(简称铯频标)、铯原子钟。
Astronomy
cesium clock
铯钟
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rein
re-indexing
reindustrialization
Reiner
Reines, Frederick
reinflate
reinforce
reinforced
reinforced concrete
reinforced concrete beam
reinforced concrete bridge
reinforced concrete column
reinforced concrete slab
reinforced concrete structure
reinforced concrete support(sustainer)
reinforced concrete truss
reinforced concrete wall
reinforced connoisseur concrete composite floor slab
reinforced insulation
reinforced plastics
reinforced soil retaining structure
reinforcement
reinforcement and elimination in combination
reinforcement and rehabilitation technology for civil engineering
reinforcement and treatment of slope
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