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【毎日一問】工程基礎知識(選択問題)20191226

2019-12-26View Original

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減圧操作において、真空度は製品の品質や収率に影響を与える重要な要素です。一定の条件下で、真空度が高く、製品の組成が重く、収率はA。 A、高い B、低い C、重い D、軽い

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