copper-clad

例句：

1. 1. The copper-clad door is very sturdy and resistant to corrosion.
   铜包门非常坚固，不易腐蚀。
2. 2. The copper-clad roof is a popular choice for homes in coastal areas.
   铜包屋顶是沿海地区家庭的首选。
3. 3. The copper-clad cables are used in high-voltage electrical systems.
   铜包电缆用于高压电气系统。