ball hardness testing machine

例句：

1. 1. This ball hardness testing machineis used to measure the hardness ofvarious materials.
   这台球硬度测试机用于测量各种材料的硬度。
2. 2. The ballhardness testing machine wasdeveloped by a team of expertsin the field.
   这台球硬度测试机是由该领域的专家团队开发的。
3. 3. Theball hardness testing machine can quickly andaccurately determine the hardness of materials.
   这台球硬度测试机可以快速而准确地确定材料的性质。