Baoding Guokun Machinery Co., Ltd: Casting: investment casting; precision casting; lost wax casting; water glass casting; silica sol casting; sand casting; green sand casting; resin sand casting; gravity casting; die casting; low pressure casting, etc Forging: Open die forging, free forging, heavy forging, close die forging, hot forging, cold forging, mold forging, upset forging, impressed-die forging, roll forging, etc Machining: rough machining, precision machining, CNC machining, turning, milling, grinding, drilling, etc Main ...