... powered 3 inch pump, 3.used popluar in irrigation,sprinkler 4.High delivery lift pump 1 ... ,powered 3 inch pump, 3.used popluar in irrigation,sprinkler 4.High delivery lift pump MODEL ... body parts and engine parts, have a special inspection test against engine ,ensure engine’s durablity, stablity , ... production, and have a test of the engine durablity, stablity on test machine ,and test 5% of this batch ...