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一种粉末颗粒-高注浆压力封堵裂隙的瓦斯抽采钻孔封孔装置及方法

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School Sign:第一单位

Disigner of the Invention:卢硕,李菁华,tangjun,黄梦牵,huguozhong,chengjianwei,陈帅,fangxinqiu,tuhongsheng

Type of Patent:国内

State of Patent:专利授权

Application Number:201811439357.4

Service Invention or Not:no

Application Date:2018-11-29

Authorization Date:2020-12-18

First Author:Zanglei