樓主: 動靜之機
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rotary broaching 旋轉拉(推)削原理------內四方,、內六方等問題的答案 |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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