Title:一种钻机钻孔速度简易自动记录仪
Institution:岩土与地下工程研究院
Type of Patent:Invent
Application Number:201410811535.7
Number of Inventors:2
Service Invention or Not:No
Application Date:2014-12-22
Publication Date:2018-10-26
Authorization Date:2018-10-26
Release Time:2019-04-16