... concrete pump parts and spare parts,like delivery pipe,elbow,clamp,rubber hose for PM,etc boom ... parts manufactureThis is the brief introduction of our products: we produce and supply concrete pump ... etc rubber sponge balls:for all kinds of concrete pump pipefittings 7.wear plate and cutting ring ... ,delivery cylinder,RAM,back-up ring,etc.9. Concrete spreader We can supply the 12m, 15m, 18m ...