pulse-echo method造句

例句与造句

1. The elastic modulus of a special alloy material are measured by the ultrasonic pulse - echo method , when the temperature is changed from - 20 ~ 60
   为实现超声声速的快速、精确测量应用数字相关法精确确定超声信号的传播时间。
2. Explain the characteristics of piezoelectric crystals and the factors relating to the resonant frequencies of a piezoelectric crystal , and the procedure of the pulse - echo method
   说明压电晶体的特性和与压电晶体的共振频率有关的因数，以及脉波回波法的过程。
3. It's difficult to find pulse-echo method in a sentence. 用pulse-echo method造句挺难的