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rotary broaching 旋轉(zhuǎn)拉(推)削原理------內(nèi)四方,、內(nèi)六方等問題的答案 |
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點(diǎn)評
看起來行啊,,具體得問刀具商,。 俺不賣這個(gè)。呵呵
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