A.低耐熱高韌性鋼 B.高耐熱性鋼 C.高速鋼 D.中耐熱性能鋼
A.低耐熱性能鋼 B.高耐熱性鋼 C.高速鋼 D.中耐熱性能鋼
A.180~200HBS B.250~260HBS C.150~180HBS D.207~255HBS