4. Mining or in situ disintegration of hard material
  5. Automatic control; signaling or indicating
  6. Of hard material disintegrating machine

Mitsui Sekitan Kogyo Kabushiki Kaisha

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Double ranging drum cutter having bedrock sensor based on video

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
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Double ranging drum cutter having load controller

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
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Method of relieving earth pressure in a working area

Hydraulic and earth engineering – Earth treatment or control
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