of the pump, while a pipe the upper end of the cylinder to press the main valve leads from its delivery chamber to a coupling noz- dowuward, the total pressure on the top of this valve zle. Coupling sections are also provided to effect a being greater than that on the bottom, on account of… … cause the main valve to descend, thereby contracting the port opening, causing the pressure on outlet side to drop quickly, and as it is this outlet pressure ling nozzle provided for connection with a delivery which acts on part of the lower side of main valve, hose, the pump has a pipe or plug for…
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