semi-automatic optical Brinell hardness tester

例句：

1. 1. This semi-automatic optical Brinell hardnesstester is very useful for testing thehardness of metals.
   这种半自动光学布林硬度测试器对于金属的硬度测试非常有用。
2. 2. The manufacturerclaims that this testercan accurately measure the hardnessof various materials.
   制造商声称，这款测试器可以准确测量各种材料的硬度。
3. 3. Theengineer used this tester to determine theoptimal processing parameters for a new material.
   工程师使用这款测试器来确定新材料的最佳加工参数。