2139| 4
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百分尺量棒校正,一個師傅說正一個說負(fù)0.01,結(jié)果相同 |
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點評
師傅說的都有理。一個說的校驗尺寸讀數(shù)-0.01.讀數(shù)499.99減去校正棒的500結(jié)果為-0.01;一個直接說的測量工件讀數(shù)要+0.01.
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