Hits:

Disigner of the Invention:chengjianwei

Type of Patent:国际

State of Patent:专利授权

Application Number:201820354428.X

Number of Inventors:2

Service Invention or Not:no

Application Date:2018-03-15

Authorization Date:2019-12-03

First Author:wangjilin

Pre One: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