真空(kong)(kong)自耗(hao)爐，真空(kong)(kong)感應爐，等離子(zi)真空(kong)(kong)焊接(jie)等真空(kong)(kong)設備中的機械(xie)泵，滑閥泵，旋片泵的油(you)煙油(you)霧(wu)凈化處理