... 2. OEM casting 3. Genuine manufacturer 4.ductile iron elevator parts ductile iron elevator parts:Materials: gray iron, ductile iron, carbon steel, stainless steel, alloy steel and ... frame, manhole covers, pump parts, handwheel, valve, flange, bollard, pilingaccessories, counterweight iron, construction machinery parts and other industry machinery parts Equipment: Laboratory:Brife Introduction of ...