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Detecting seam boundary using pick sound

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Ore/rock interface determination during cutting
Patent

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Determining the locus of a processing zone in an oil shale retor

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Device for cooling the bits of a cutting machine

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Device for cooling the bits of cutting machine

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Device for preventing collision between part of the cutting arm

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Device for protecting selective cutting machines against...

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Reexamination Certificate

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Device for removing gravels and the like from discharged mud in

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Doping a retort to determine the locus of a processing zone

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Double ended ranging drum shearer and method of controlling work

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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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
Patent

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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
Patent

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Drive system having a pin drive chain for a cutting machine for

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Driving system for driving flexible elongate members, such as ch

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
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