1566| 7
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為什么標(biāo)注直徑時不能在引線上下方都標(biāo)文字 |
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點評
標(biāo)注直徑時,,有關(guān)直徑的文字或數(shù)量的說明應(yīng)標(biāo)注于直徑的前,,或后面。
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