... 2.4Mpa+Low cost Hydraulic rock core mining drilling machine (KQG120Y-II) hydraulicKQG120A high air-pressure down ... or electric energy). It is mainly used in drilling work, for example, surface mining, hydroelectric engineering, ... consumption: 11.3-14m3/minMaximum horizontal rock drilling height: 3.1mMaximum angle of inclination of ... optional) Hydraulic rock core mining drilling machine (KQG120Y-II)