sand casting round manhole cover and frame ISO9001:2008 Material:gray,ductile iron Process:sand casting OEM foundry casting sand casting round manhole cover and frame1)Material:grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC...

square ductile iron sand casting manhole cover ISO9001:2008 material:gray,ductile iron Process:sand casting OEM foundry cast square ductile iron sand casting manhole cover1.Material:ductile iron 400-18,450-10,500-7,steel,alloy by vacuum casting,sand casting,lost...

sand casting manhole cover and frame ISO9001:2008 Material:ductile iron,gray iron Process:sand casting OEM foundry casting sand casting round manhole cover and frame1.Material:grey ironGG15,GG20,GG25,GG30,ductile iron 400-18,450-10,500-7 by vacuum casting,sand casting,lost...

sand casting ductile iron manhole cover ISO9001:2008 Material:ductile iron Process:sand casting,vacuum casting OEM casting sand casting ductile iron manhole coversand casting iron machinery parts: excavator's driving wheel1.Material:ductile iron 400-18,450-10,500-7,steel,alloy...

sand casting ductile iron manhole covers ISO9001:2008 Material:ductile iron,gray iron Process:sand casting OEM casting sand casting ductile iron manhole covers1)Material:grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC...

round sand casting ductile iron manhole cover and frame ISO9001:2008 Material:ductile iron Process:sand casting OEM casting round sand casting ductile iron manhole cover and frame1)Material:grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or...