reference test pieces造句

例句与造句

1. Reference test pieces
   对比试块
2. Charpy pendulum impact test - reference test pieces for verification of testing machines
   摆锤式冲击试验.试验机械检定用标准试验样品
3. Method for measurement on ultrasonic velocity of solid by pulse technique using reference test piece
   用基准试样通过脉冲技术测量固体超音速的方法
4. It's difficult to find reference test pieces in a sentence. 用reference test pieces造句挺难的