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:xiaoweili,赵乾坤,郭庆,闵祥文,石晶泰,温德华
- Type of Patent:国内
- State of Patent:专利授权
- Application Number:201710196823.X
- Number of Inventors:7
- Service Invention or Not:no
- Application Date:2017-03-29
- Authorization Date:2019-12-03
- First Author:renwanxing
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