同根派生 electrical relay相關(guān)詞英漢例句I need to buy car relay ,please and contact us.我們需要求購(gòu)汽車?yán)^電器，請(qǐng)聯(lián)系我們。Only one relay is closed at any time.在某一時(shí)間，僅有一個(gè)繼電器是閉合的。electrical relay更多例句