The bronze ware is a great invention in the history of humanbeings.It is some kind of material in alloy which is made up of red copper with tin or plumbic.

 
  • 青铜是人类历史上一项伟大发明,它是一种红铜加锡或铅的合金材料,也是金属冶铸史上最早的合金。
今日热词
目录 附录 查词历史