基本解释过载限时继电器词组短语短语overload d time relay 过载限时继电器otr overload time relay 过载限时继电器;过载限时OTR R overload time relay 过载限时继电器three time overload relay 三次过荷继电器overload time relay更多词组专业释义动力与电气工程过载限时继电器