expansion pyrometer

例句：

1. 1.The engineer used the expansion pyrometer to measure the temperature of the metal.
   工程师使用膨胀计测量金属的温度。
2. 2. The company developed a new expansion pyrometer that could detect changes in material properties more accurately.
   该公司开发了一种新型膨胀计，能够更准确地检测材料属性的变化。
3. 3. During the testing phase, the technician used the expansion pyrometer to monitor the progress of the experiment.
   在测试阶段，技术员使用膨胀计监测实验的进展。