基本解释過載限時繼電器词组短语短語overload d time relay 過載限時繼電器otr overload time relay 過載限時繼電器;過載限時OTR R overload time relay 過載限時繼電器three time overload relay 三次過荷繼電器overload time relay更多词组专业释义動力與電氣工程過載限時繼電器