Thus Ductile iron valves can easily replace cast iron or steel valves.
因此球墨铸铁阀门能够方便的替换铸铁或钢阀门。
2
In next phases, a ductile iron pipes factory with the production capacity of 2 hundred-thousand tons and a steel factory with the production capacity of 2.5 million tones per annum will be added.
在下一阶段，将继续建成一个年产20万吨的球磨铸管厂和年产250万吨的钢厂。
3
Pump cover material with steel ZG230-450 more, can also be used ductile iron, the latter two materials contrast of wear resistance and hardness and heat resistance to be because the former.