无铅黄铜
- 网络Lead-Free Brass; unleaded brass
无铅黄铜
无铅黄铜
Lead-Free Brass
??(?)???? ... 铜电极( Copper Anode) 无铅黄铜( Lead-Free Brass) 锻造黄铜( Forging Brass) ...
unleaded brass
铅铜,Pb &... ... ) lead-zinc-silver-copper 铅锌银铜 ) unleaded brass 无铅黄铜 ) Pb & Cu 铅铜 ...