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放射性标准溶液
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放射性标准溶液
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radioactive standard solution; radioactivity standard solution
放射性标准溶液
用作放射性标准的放射性溶液,其放射性比活度用绝对测量方法准确测出,这种溶液能满足一定的物理化学性质要求。
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upper sum
upper surface
upper tangent arc
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upper triangular group
upper triangular matrix
upper-trimmed subsequence
upper type
upper unitriangular matrix
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upper urinary tract lithiasis
upper value
upper variation
Upper Volta
upper water level for flood control
Upper Xiajiadian Culture
upper Yangtze platform
Upper Yangtze River Rare and Endemic Fish National Nature Reserve
Uppsala General Catalogue of Galaxies
Uppsala University
up-punching type
up quark
upright
Upright Commissioner Yu Chenglong
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