backward-wave oscillator tube造句

例句与造句

1. Measurement of the electrical properties of microwave tubes . part 8 : backward - wave oscillator tubes - " 0 " type
   微波管电性能的测量.第8部分:回波振荡管
2. It's difficult to find backward-wave oscillator tube in a sentence. 用backward-wave oscillator tube造句挺难的