High quality of R407,R410 New Refrigerant Rotary Vacuum Pump Simple in structure,convenient in installation, the noise is ... new refrigerant rotary vacuum pump,double frequency double voltage rotary vacuum pump,singel series stage vacuum pumpR407,R410 new refrigerant rotary vacuum pump, there are many ... models,such as 2TM-0.5R,2TM-1R,2TM-1.5R,2TM-2R, 2TM-3R,2TM ...