煤矿许用电雷管 meaning in English
permissible electric detonator
Examples
- Test method of safety of permissible electric - detonator in inflammable gas
煤矿许用电雷管可燃气安全度试验方法 - Test method and judge rules of safety of permissible electric detonator for coal mining in firedamp
煤矿许用电雷管井下可燃气安全度.试验方法和判定规则