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功率天平
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功率天平
Encyclopedia
工学
电学量计量单位的复现
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Watt balance/Kibble balance
功率天平
利用电功率与机械功率的平衡,测定电功率单位SI量值的装置。也可以用于测量普朗克常数h和质量单位千克的复现。
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Haihe River flood in 1996
Haihe River Water Conservancy Commission of the Ministry of water resources
Haihe tidal barrier
Haihe Tidal Gate
Haihe Water Resources
Haihe’s River Park of Tianjin
Haihun marquis Liu He
haikai
Haikou City Qiongju Performing Arts Co. Ltd
Haikou intelligent tourism
Haikou Port
Haikou Shi
Haikou Theatre
Haikou Wan
haiku
hail
Hailai Reji
Hailar Qu
hail damage
hail damage in agricuture
hail disasters in China
Hailehu
Haile SelassieⅠ
Hai Lianchi
Hailin economic and technological development zone of Mudanjiang
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