Vacuum Pump Parts: 16" of 2" PVC Pipe 20" of 1 1/4" PVC Pipe 2" End Cap 1/4"x1/8" Brass Hose Fitting 3' of 1/4" Vacuum Line 1 1/4" End Cap (x2) 1 1/4" Diameter O Ring 2" Coupling 2" x 1 1/2 ...

State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, China Key Laboratory of Drilling and Production Engineering for Oil and Gas Hubei Province, Yangtze ...