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一種突出煤層鉆孔水力吞吐增透方法
inventor/creator:郭保華
Paten number/application number:201410172938.1
application/authorized announcemen date:2018-7-19
brief introduction:一種突出煤層鉆孔水力吞吐增透方法,申請?zhí)枺?01410172938.1,中國,發(fā)明專利,第一。
Paten number/application number:201410172938.1
application/authorized announcemen date:2018-7-19
brief introduction:一種突出煤層鉆孔水力吞吐增透方法,申請?zhí)枺?01410172938.1,中國,發(fā)明專利,第一。