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07
2020-12
Mechanics mechanism of pressure relief drilling for hole protection in soft coal seam
Mechanics mechanism of pressure relief drilling for hole protection in soft coal seam
2020-12-07
07
2020-12
Design and Application of Multi-section Bundled Cordage Coring Drill
Design and Application of Multi-section Bundled Cordage Coring Drill
2020-12-07
26
2020-11
Development and Practice of High Pressure Fracture Grouting Modification Technology in Kilometer Deep Mine Roadway
2020-11-26
26
2020-11
Research status and prospect of intelligent mining technology in coal mine.pdf
Research Status and Prospect of Intelligent Mining Technology in Coal Mine
2020-11-26
26
2020-11
Air compound directional drilling technology and equipment for broken soft coal seam in coal mine
2020-11-26
26
2020-11
Key technology of directional drilling along each layer of 3000m underground coal mine. pdf
Key Technology of Directional Drilling Along Each Layer at 3000m in Coal Mine
2020-11-26
03
2020-11
Development and application of high efficiency drilling equipment for soft and hard composite coal seam
2020-11-03
03
2020-11
Development of Lightweight Hydraulic Tunnel Core Drilling Rig
Development of Lightweight Hydraulic Tunnel Core Drilling Rig
2020-11-03
03
2020-11
ZDY2-300LM Type Full Hydraulic Tunnel Drilling Rig with Double Working Arm
ZDY2-300LM Type Full Hydraulic Tunnel Drilling Rig with Double Working Arm
2020-11-03
