... , etc. YL-600(S)(TWS-600(S))intermittent plunger pump for oil well work, such as: acidification, cementing, fracturing, etc.. cover well ... , operation. Is a high-pressure piston pump of choice for ... layer, forming a series of interchangeable pump(3” pump 3-1/2” pump 4” pump 4-1/2” pump), to meet different requirements of the ...