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發(fā)布時(shí)間: 2017-3-18 21:04
正文摘要:本帖最后由 王樹大 于 2017-3-18 21:07 編輯 6 y$ N2 b; w# U6 c " G3 d/ X5 R! t2 V 它的特點(diǎn)就是圓筒套圓筒,,配合一條鍵槽,,然后內(nèi)芯再套絲杠,并且前面也封死,,所以絲杠與活零完全封閉住了,這樣外來(lái)的鐵 ... |
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