Technical  Research

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Manufacturing Process of  Ductile Iron Pipes

   Melting         Heat Treatment 

   Shot Blasting                    Centrifugal Resin 

Machining         Centrifugal Casting

Inside Cement Mortar Lining                                          

　 Handing and Transport                                              

Manufacturing Process of Ductile Iron Fittings

  Melting                                                        Pouring

Shot Blasting       Making   

Machining                                Coating 

Manufacturing Process of  Valves

Casting   Hydrostatic Pressure Test

Machining                      

Assembling                                                  

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