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縫紉機(jī)夾爪機(jī)構(gòu)怎么畫 |
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點(diǎn)評(píng)
這個(gè)行業(yè)很窄,,做包邊的基本都要用卷邊器,,書什么的沒加過,基本都是行業(yè)內(nèi)摸索,。
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