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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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Steenrod operation
Steenrod power
Steenrod powers
Steenrod problem
Steenrod realization problem
Steenrod reduced power
Steenrod-Sitnikov homology
Steenrod square
Steenrod squares
Steen Steensen Blicher
steepest
steepest ascent
steepest-ascent method
steepest descent
steepest-descent algorithm
steepest descent method
steepest-descent method
steepest descents
steepest line
steep growth
steeplechase
steepness
steep pulse
steep ramp
steep slope
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