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national standard
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由国家的官方标准化机构或政府授权的有关机构批准、发布,在全国范围内统一适用的标准。它是标准的一个级别。
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traceless tensor
trace level
trace line
trace mapping
trace method
trace minerals in coal
Trace Model of word recognition
trace norm
trace of a commutator
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trace [of matrix]
trace of matrix
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