... cup,steel elbows,alloy high-Mn steel elbow, hard alloy wears plate Cutting ring, S pipe swing valve,concrete pump piston hydraulic ... . Our company's newly-operation production line of medium-frequency concrete pump reducer pipe can produce 20 #, 35 #, J55 wear-resistant ... 3 meters of the reducers. Our company's main apportion concrete pump brands: China Zoomlion, China Sany Heavy Industry, PM ( ...