常見例句雙語例句The invention discloses an uninterrupted dual power supply changeover switch, which comprises an encloser, a contact on-off system and a mechanical transmission system.本發(fā)明公開了一種無間斷雙電源轉(zhuǎn)換開關(guān)，包括殼體、觸頭分合系統(tǒng)、和機械傳動 系統(tǒng)；ip.com 返回 changeover contact