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秒长国家计量基准
释义
秒长国家计量基准
Encyclopedia
工学
频率标准
释
national primary frequency standard
秒长国家计量基准
直接复现秒定义的实验装置。输出的标准频率具有最高计量学特性,作为统一全国秒长量值(频率量值)最高依据的计量器具,全国只有一套。
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sand pile analogy
sandpile model
sand pile paradox
sandplay therapy
sand polished section
sand-pouring machine
sand prevention and control engineering of Dunhuang Mogao Ku
sand prevention by transferring measures
sand prevention for railway
sand prevention for road
sand production
sand production prediction
sand-protecting barrier
Sandra A.Thompson
Sandra Bullock
sandramycin
S.Andrea,Mantua
sand reckoning
sand recovering machine
sand removing device
sand retaining wall
sand ripple
sand ripples
Sand River Convention
Sandro Botticelli
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更新时间:2025/11/28 20:54:16