дөрвөн конусан бутлуурДөрвөн Roller Cold Rolling Mill Casting rolling mill-Cold rolling mill-hot rolling mill Zhengzhou Hengzhong Heavy Machinery Manufacturing Co, Ltd is an aluminum equipment company, our main products include aluminum cast rolling mill, cold rolling mill, aluminum foil rolling machine, tension leveling line, cut to length line, slitting line, cast roll, roller sleeve, steel sleeve, etcдөрвөн конусан бутлуурДөрвөн Roller Cold Rolling Mill Casting rolling mill-Cold rolling mill-hot rolling mill Zhengzhou Hengzhong Heavy Machinery Manufacturing Co, Ltd is an aluminum equipment company, our main products include aluminum cast rolling mill, cold rolling mill, aluminum foil rolling machine, tension leveling line, cut to length line, slitting line, cast roll, roller sleeve, steel sleeve, etc