A.爆燃 B.高壓波 C.爆炸音頻 D.工作壓力
A.合金調(diào)質(zhì)鋼 B.耐腐鋼 C.合金結(jié)構(gòu)鋼 D.合金滲碳鋼
A.0.20%~0.60% B.0.20%~0.50% C.0.25%~0.60% D.0.25%~0.65%