cupraloy

例句：

1. 1. This new alloy is more durable than the old one.
   这种新合金比旧合金更耐用。
2. 2.The engineer used this alloy to make the gears.
   工程师用这种合金制造齿轮。
3. 3.The cupronickel wire was used in the construction of the bridge.
   铜铬合金线用于桥梁的建设。