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一种区段无煤柱开采方法
- Release time:2020-10-30
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Affilication of Author(s):
矿业工程学院Disigner of the Invention:
zhangdongshengNote:
张东升Type of Patent:
国内State of Patent:
专利授权Application Number:
201010151022.XNumber of Inventors:
2Service Invention or Not:
noApplication Date:
2010-04-08Authorization Date:
2013-07-03First Author:
Ma Liqiang
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