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ru atom frequency standard
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ru atom frequency standard
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ru atom frequency standard
星载铷钟
由铷量子部分和压控晶体振荡器组成的铷原子钟。可以作为频率标准,产生高稳定度、低漂移率的单频正弦信号。又称铷原子频标。
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underrelaxation factor
underrelaxation method
underscore
underscreened Kondo effect
undersea cable
undersea delta
undersea farm
undersea feature names
undersea mining technology
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undersea space station
undershoot
undershooting
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undersocialized
undersonic frequency
underspeed
understandability
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understanding
Understanding and Interpretation:A Study of Audience and Museum Learning
Understanding Media: The Extensions of Man
Understanding Poetry
understanding psychology
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