flex tester

例句：

1. 1. This is a flexible tester that can be used to measure the flexibility of materials.
   这是一个可以用于测量材料柔韧性的柔性测试器。
2. 2. The engineer used a flexible tester to check the quality of the new product.
   工程师使用柔性测试器检查新产品的质量。
3. 3. The flexible tester was used to measure the deformation of the material under different loads.
   柔性测试器被用来测量材料在不同载荷下变形的情况。