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合頁 合頁   合頁又名合葉,正式名稱為鉸鏈,常組成兩折式,是連接物體兩個部分并能使之活動的部件。...
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儀表車床加工件 儀表車床加工件   儀表車床加工件的基本要求是定位準確,夾緊,在車床上安裝工件應使被加工表面的軸線與車...
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