[電學] 低電壓儀器保護電路 glass for protecting against heat: 防熱玻璃under water environment protecting: 海底環(huán)境保護under voltage: 低電壓; 低壓的; 電壓不足的; 欠電壓; 欠壓fall against the apparatus: 摔倒碰器械dc under voltage relay: 直流低壓繼電器下載手機詞典可隨時隨地查詞查翻譯