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释义
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工学
〔化学计量基本概念〕
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基准标准物质
在化学测量领域中用作原级(基准)测量标准的物质。是化学测量溯源体系的顶层物质基础,也是有证标准物质的最高等级。
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基准物质
>分析化学>标准物质>释义
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一级标准物质
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modern agriculture demonstration zone
modern agriculture economy
Modern agriculture industry
modern algebra
modern aluminum industry in China
modern and contemporary syrian literature
Modern and Historical Plays of Chinese Drama
modern apprenticeship
modern architectural technology in China
modern architecture in Beijing
Modern Architecture International Exhibition
Modern Architecture Research
Modern Architecture:A Critical History
Modern Archives: Principles and Techniques
Modern Art
Modern Art Week
modern astronomy
modern axiomatic method of Hilbert
modern beryllium industry in China
modern bibliography science
modern bridge
modern bridges
modern British architecture
Modern Buddhism
Modern Buildings at Yantaishan
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