基本解释[管理学]保护接地装置英汉例句双语例句It is necessary to use two—stage selective earthing protective device in the power supply system of open—pits.露天矿供电系统中采用两级选择性接地保护装置十分必要。protective earthing device更多例句词组短语短语protective e earthing device 保护接地装置protective earthing device更多词组专业释义管理学保护接地装置