iron constantan thermocouple

例句：

1. 1.The constantan wire is used in the construction of bridges and tunnels.
   康斯坦因合金线用于桥梁和隧道的建设。
2. 2.The constantan thermocouple is a sensitive instrument that can detect temperature changes.
   康斯坦因热电偶是一种敏感的仪器，可以检测温度变化。
3. 3.The constantan material has excellent corrosion resistance and high thermal conductivity.
   康斯坦因材料具有良好的耐腐蚀性和高热导率。