Reloling Mills In Riyadh Ksa. Henan ftmine heavy machinery co., ltd., the former henan first machinery factory, founded in henan zhengzhou- china machinery manufacturing capital in 1982, is a large joint-stock company specialized in manufacturing heavy mining machinery and civilian machinery it has six production bases with an area of 240,000m2, more than 2000 existing employees, 160,000 m2 ...