中新公司离心铸造球墨（可延性）铸铁管产品通过鉴定由中国工程建设标准协会管道结构委员会主持的、中国新兴铸管联合公司（原中国人民解放军２６７２工厂）生产的离心铸造球墨（可延性）铸铁新产品鉴定会于１９９４年６月２３日至２４日在河北省邯郸市召开，来自京、津、... China National’s New Centrifugal Cast Ductile Iron Ductile Iron Pipe Products Demonstrated by Centrifugal Cast Ductile Ductile Ductile Ductile Iron Ductile Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Cast iron new product identification will be held June 23, 1994 to 24 in Handan City, Hebei Province, from Beijing, Tianjin, ...