DRILLING HIGH HOLES FOR DRILLING RIG BASED ON COMPLICATED WORKING CONDITIONS UNDERGROUND COAL MINE
CSAA/IET International Conference on Aircraft Utility Systems ; 2018 ; Guiyang, Guizhou
2018
Aufsatz (Konferenz)
Englisch
Europäisches Patentamt | 2025
|Coal mine production drilling sampling device and using method thereof
Europäisches Patentamt | 2024
|