... leading concrete pump spare parts manufactures in ChinaInculd:Pipe Factory ,Casting Factory ,Wear Plate Factory ,Rubber Hose Factory.and last ... has two kind ,one kind is for 50.000M3, another kind is for 100.000M3 Casting Elbow, :We have business with Putzmeister ... ,Schwing For 12 year, we have biggest facotry in china for Product Casting ...