ent instrument after the demolition of the joints coated with oil or blending paint
time2012/02/26
entinstrumentafter the demolition ofthejointscoated withoil orblendingpaint,and tighten thescrews.entinstrumentbecause oftheair orthe inletgas accumulation, ortheend of the valvein the pump bodylaxofftheirrigation waterdissatisfaction,aseriousleakofthevacuum pumppacking,gate ordoorclosed lax.entinstrumentexclusion method: First thewater pressureup, and thenpumpfilled with water, and thenbootentinstrumentat the same timecheckthecheck valveistight,piping, fittingsorwithoutair leaks,andfoundtheleak..