4960| 14
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請(qǐng)教:絲錐后面有個(gè)“方”,而鉆頭沒(méi)有,是因?yàn)榻z錐扭矩大嗎? |
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來(lái)自 3#
發(fā)表于 2017-12-13 07:41:32
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請(qǐng)大俠詳解
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“允許起到浮動(dòng)”不理解,希望大俠仔細(xì)講講,
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