hardness testing

例句：

1. 1.The engineer conducted a hardness testing on the new material to ensure its durability.
   工程师对新材料进行了硬度测试，以确保其耐用性。
2. 2. During the manufacturing process, we conduct hardness testing to ensure product quality.
   在生产过程中，我们进行硬度测试以确保产品质量。
3. 3. The company uses hardness testing as part of their quality control procedures.
   该公司将硬度测试作为其质量控制程序的一部分。