灰铸铁管和配件
grey iron pipe and fitting
铸铁臭气管配件
cast iron soil pipe fitting
薄壁灰铸铁件
thin wall gray iron casting
大断面球铁铸件
wheel of airport boarding bridge
大型复杂球铁铸件
Large complex ductile iron castings
缸套铸铁件
Cylinder liner of casf iron
厚大断面球铁铸件
heavy section nodular iron casting
厚大球墨铸铁件
heavy nodular iron castings