permitted electric detonator for coal mine
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