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厚煤层大采高沿空留巷方法
Release time:2020-10-30  Hits:

Affilication of Author(s):矿业工程学院
Disigner of the Invention:张农
State of Patent:专利授权
Application Number:2015377025
Authorization number:2015377025
Number of Inventors:2
Service Invention or Not:no
Application Date:2015-12-21
Authorization Date:2018-07-05
First Author:hanchangliang