Vacuum Heat Treatment) 1, LT has the advanced thermal cycle steel rolling production line. 2, LT has the reversible type high efficiency alloy steel rolling production line. 3, LT has the advanced high-speed steel vacuum nitrogen welding furnace production line. 4, LT domestic first high-pressured two dimensional shaped quenching heat treatment production line. 5, LT has the large volume vacuum high pressure gas quenching and vacuum oil quenching treatment equipment. 6, LT has the efficient grinder with high precision imported from Germany. 7, LT has the international advanced technique of refrigerating treatment. 8, LT has the perfect system of quality detection and technical control.