Ningbo Tongjie Metal Industry Co., Ltd established in July,1981,specialized field in manufactured parts of carton steel ,alloy steel ,stainless steel ,etc and casting of moter parts ,extend to flange on 1985 ,platform trailor parts on 1987,early 1990,beginning to produce stainless steel ball valves a nd various of valves additionlly ,upgrading technique ,professional R&D ,and pefect of services ,to win
credits and admirations from world wide of customers .