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有效数
bridg.constr. significant figures
oil significant digit; significant figure; effective number
telecom. significance
有效数
IT significant digit
met. significant figure
有效 f 数
tech. effective relative aperture
有效数[字]
agric. significand (significans)
有效f数
tech. effective f-number
有 效 数
: 393 phrases in 54 subjects
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