four-ball extreme pressure tester

例句：

1. 1. This four-ball extreme pressuretester is used to measure the strengthof materials under extreme conditions.
   这个四球极限压力测试仪用于测量材料在极端条件下的强度。
2. 2. The manufacturer claims that thisfour-ball extreme pressure tester canaccurately detect any defects in the material.
   制造商声称，这个四球极限压力测试仪可以准确地检测出材料中的任何缺陷。
3. 3.The engineer used this four-ball extremepressure tester to evaluate the performance ofthe new design.
   工程师使用这个四球极限压力测试仪来评估新设计的性能。