... , cylinder, cylinder bonnet, piston, rod, locking shaft, sealing element and ram assembly and hinge. Its working principle is: the high pressure oil ... close chambers of the left and right cylinders and push piston and rod to move the left and right ram assembly along ... 29--+121Actuating MediumOil with H2S, Natural Gas, Drilling Fluid, and Free WaterOutside Dimension(L×W×H)Single Ram1392×635×736Double ...