2752| 7
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前輩們幫小生瞅瞅這圖哪種表達(dá)正確吧!謝謝 |
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點(diǎn)評(píng)
請(qǐng)問(wèn)前輩,圖二中間部分的斷面線實(shí)際上那里根本沒(méi)有零件呀,那這段斷面線對(duì)嗎?
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