现在徽章是用模具从炮铜中冲压出来的.Nowadays badges are stamped out of gunmetal.它们是海军炮铜制造的.They were made of admiralty gun metal....

“炮铜”的英语可以翻译为：gunmetal，gun brass ...

“炮铜”的拼音为：pào tóng...