permitted electric detonator for coal mine_煤炭科技英汉词典
permitted electric detonator for coal mine
[煤炭科技英汉词典]
permitted electric detonator for coal mine煤矿许用电雷管
经主管部门批准，允许在有瓦斯和(或)煤尘爆炸危险的煤矿井下使用的电雷管。
是什么意思，permitted electric detonator for coal mine的解释，permitted electric detonator for coal mine的翻译
