在六、七十年代，电力电子技术完全是建立在模拟电路基础上的。

In the 1960s, 1970s, the power electronics technology is built on the basis of the analog circuit.

youdao

在六、七十年代，电力电子技术完全是建立在模拟电路基础上的。

In the 1960s, 1970s, the power electronics technology is built on the basis of the analog circuit.

youdao