铜镍合金

例句：

1. 1. This alloy is used in the production of high-strength steel.
   这种合金用于生产高强度钢材。
2. 2. The copper-nickel alloy has excellent corrosion resistance.
   铜镍合金具有极好的耐腐蚀性。
3. 3. The alloy was developed to improve the strength and durability of the material.
   这种合金的开发是为了提高材料的强度和耐用性。