photoelasticimeter

例句：

1. 1. The photoelasticimeter was used to measure the stress in the material.
   光弹仪被用来测量材料中的应力。
2. 2. The engineer used the photoelasticimeter to test the strength of the concrete beams.
   工程师使用光弹仪测试混凝土梁的强度。
3. 3. The photoelasticimeter was a valuable tool for studying the behavior of materials under different conditions.
   光弹仪是研究材料在不同条件下行为的一种宝贵工具。