ball indentation testing apparatus

例句：

1. 1. Theball indentation testing apparatuswas used to measure the hardness ofthe material.
   球压痕试验装置被用来测量材料的硬度。
2. 2. The ball indentation testing apparatus was used totest the durability of the material.
   球压痕试验装置被用来测试材料的耐用性。
3. 3. The ball indentation testing apparatus was used to test the strengthof the material.
   球压痕试验装置被用来测试材料的强度。