Fe-C-Si-Mo系合金延性铸铁
Fe-C-Si-Mo ductile cast iron
Fe-C-Si-Mo system ductile cast iron
白心展性铸铁
white gold
white heart malleable cast iron
white heart malleabel cast iron
高强度展性铸铁
high-strength malleable cast iron
黑心展性铸铁
black lamp
black heart malleable cast ir
blackheart malleable cast iron
black heart melleable cast iron