基本解释[琯理學]保護接地裝置英汉例句雙語例句It is necessary to use two—stage selective earthing protective device in the power supply system of open—pits.露天鑛供電系統中採用兩級選擇性接地保護裝置十分必要。protective earthing device更多例句词组短语短語protective e earthing device 保護接地裝置protective earthing device更多词组专业释义琯理學保護接地裝置