2920| 7
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螺纹请教 |
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发表于 2007-11-3 18:49:57
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发表于 2007-11-3 22:42:51
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发表于 2007-11-4 09:12:00
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发表于 2007-11-4 09:35:17
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发表于 2007-11-4 10:03:19
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有这个螺纹,客应标注为R3/4
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