2851| 12
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機(jī)械制圖(二) |
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點(diǎn)評(píng)
必須滴
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點(diǎn)評(píng)
可能你沒做過樣機(jī)之類,。這樣說吧,,對(duì)于未能采用注塑成形工藝的結(jié)合件,這方面只要做過手板的工程師都有切身體會(huì)的哈
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