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US20140241907 HIGH PRESSURE WATER INJECTION PUMP SYSTEM  
The invention provides a high pressure water injection pump system, comprising at least two water injection pump units connected in series, each pump unit comprising a motor in a motor compartment...
US20090246040 Multistage Vacuum Pump Unit and an Operation Method Thereof  
A multistage vacuum pump unit can save a power requirement and prevent the gas discharged outside of the unit from flowing-back inside the pump unit. A plurality of vacuum pumps are connected in...
Matches 1 - 2 out of 2