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請(qǐng)教:柔性攻絲保護(hù)絲錐不折斷的原理是什么? |
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點(diǎn)評(píng)
“會(huì)自動(dòng)反轉(zhuǎn)退出來”僅僅靠浮動(dòng)夾頭自身來實(shí)現(xiàn)嗎?不用機(jī)床配合?
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