A.0.01~0.04 B.0.008~0.03 C.0.006~0.02 D.0.005~0.01
A.碳素結(jié)構(gòu)鋼 B.碳素工具鋼 C.優(yōu)質(zhì)鑄鐵離心澆鑄 D.特殊性能鋼
A.0.01~0.02 B.0.02~0.03 C.0.03~0.10 D.0.1~0.3