pencil scratching tester

例句：

1. 1.The pencil scratching tester is used to check the quality of the paper.
   铅笔划痕测试器用于检查纸张的质量。
2. 2. The engineer used the pencil scratching tester to measure the thickness of the material.
   工程师使用铅笔划痕测试器来测量材料的厚度。
3. 3.The pencil scratching tester was a useful tool for testing the quality of the paint.
   铅笔划痕测试器是检测油漆质量的一种有用的工具。