hardness drop tester

例句：

1. 1.The hardness drop tester was used to measure the hardness of the material.
   硬度下降测试仪用于测量材料的硬度。
2. 2.The hardness drop tester was used to determine the quality of the material.
   硬度下降测试仪用于确定材料的质量。
3. 3. The hardness drop tester was used to analyze the properties of the material.
   硬度下降测试仪用于分析材料的性质。