一种用于煤矿井下防灭火注浆的一次性伸缩式钻具
- Affilication of Author(s):安全工程学院
- Disigner of the Invention:郭庆,赵乾坤,温德华,张立轩,王振峰
- Type of Patent:国内
- State of Patent:专利授权
- Application Number:201610742341.5
- Number of Inventors:6
- Service Invention or Not:no
- Application Date:2016-08-26
- Authorization Date:2018-10-30
- First Author:renwanxing
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