A.滲碳鋼B.工具鋼C.彈簧鋼D.調(diào)質(zhì)鋼
A.不銹鋼B.沸騰鋼C.高強度耐候鋼D.鎮(zhèn)靜鋼
A.0.5mm或0.8mmB.0.25mm或0.7mmC.0.5mm或0.7mmD.0.5mm或1mm