unilateral thickness gauge

例句：

1. 1.The thickness gauge is used to measure thethickness of materials.
   厚度计用于测量材料的厚度。
2. 2. The engineer used the thickness gauge tocheck the quality of the metal.
   工程师使用厚度计检查金属的质量。
3. 3. Thethickness gauge was used toensure that the material met therequired specifications.
   厚度计被用来确保材料符合规定的规格。