This paper presents working principles of four kinds of different frequency control ways and methods of three type load controls,and at last gives the conditions that selective control way should be met.是什么意思_This paper presents working principles of four kinds of different frequency control ways and methods of three type load controls,and at last gives the conditions that selective control way should be met.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句