3676| 4
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理論上,用普車攻絲(活轉(zhuǎn)錐不轉(zhuǎn))與用立鉆攻絲(錐轉(zhuǎn)活不轉(zhuǎn))于螺紋質(zhì)量有差異嗎? |
點(diǎn)評(píng)
大俠已經(jīng)表達(dá)的很好了
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