DoubleStageWaterRingVacuumPumpInresponsetotheoverwhelmingdemandreceivedfromthemarket,PROMIVAChascomeforthwithaDoubleStageversionoftheirvastlypatronizedWater-ringtypeVacuumPump.Eachandeverypumpofthisne…
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2013-03-26 09.49.01 点击：
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