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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 5 S, C' r+ }3 N( m4 M d ) u/ B z& \$ g4 u 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 ... |
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