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一种巷道顶板锚杆钻孔充填树脂药卷方法
- Release time:2020-10-30
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Affilication of Author(s):
矿业工程学院Disigner of the Invention:
刘权,张东升,屠世浩,王红胜Type of Patent:
国内State of Patent:
专利授权Application Number:
201210520447.2Number of Inventors:
5Service Invention or Not:
noApplication Date:
2012-12-07Authorization Date:
2015-04-29First Author:
Ma Liqiang
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