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為何要留1mm? |
點(diǎn)評
原來如此!學(xué)習(xí)了,!果然有問題要多問,,以為是畫錯(cuò)的地方藏著大學(xué)問。
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點(diǎn)評
另一端是圓錐滾子軸承
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點(diǎn)評
簡單,把外圈打碎掏出來,,哈哈
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點(diǎn)評
哈哈,我瞎扯的,,催眠自己
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