Features: 1) Materials: carbon steel 2) Applied software for specification drawings: Pro-E, Auto CAD, Solid work, UG, CATIA 3) Main equipment: hot forging press, air stamp hammer, warm forging press, trimming press, high-frequency induction furnace, normalizing continuous furnace, annealing, shot blasting machine, 4) Surface treatment: case nitriding, case cementite, case influence quench