... China Carbide City, are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion, Putzmeister,Schwing, ... etc. Our products are mainly include but not limit to spectacle wear plate, wear ring, s pipe, chrome bushing, ... , Kyokuto, Putzmeister, Waitzinger etc 3. other concrete pump spare parts: delivery Pipe(both normal and hardened) , elbow(welding& casting ...