The company specialized in drawing steel. 該公司主要生產(chǎn)冷拉鋼。
Experiment results show that removing the surface broken crystal layer of the cold drawn rod can prevent heat treatment induced cracks. 實(shí)驗結果表明,熱處理前去掉冷拉棒表面的碎晶層可以防止它在熱處理過(guò)程中產(chǎn)生裂紋。