... production equipment including 3600 tons and 2800 tons extruding machine, 1350 tons 1300 tons and 880 tons double-acting ... extruding machine, 800 tons reverse extruding machine, 630 tons 500 tons extruding machine, tension straightening machine, 11 rollers straighter, ... , homogeneous furnace, and ageing oven, eight set of intermediate frequency induction furnace and oxidation ponds.