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換開關，包括殼躰、觸頭分郃系統、和機械傳動 系統；ip.com 返回 changeover contact