principles of electric circuits的用法和樣例：
例句
- This paper introduces an intelligence stepping motor power pulse distributor hardware circuits and software design.
一種智能型步進電機電源脈衝分配器的硬體電路原理和軟體設計。 - This article introduces emphatically the practical control methods and circuit principles of battery self charging by stages by the arc welder.
重點介紹利用交流弧焊器對蓄電池自動實施分階段法充電的調控方法和調控電路原理。
