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Secondary oil shale recovery technique

Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent

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Sectional conveyor with sectional rack fixed on the conveyor at

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Sidewall-working
Patent

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Sectional cutting machine used to cut curved gallery cross-secti

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Relatively shiftable cutters
Patent

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Sectorial sprinkling device for coal mining

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Cleansing fluid passage
Patent

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Selective mining from horizontal holes

Mining or in situ disintegration of hard material – Processes – Breaking down by direct contact with fluid
Patent

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Selectively phased water supply of a cutter head

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Cleansing fluid passage
Patent

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Self propelled excavating vehicle

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...
Patent

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Self propelled saw

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self propelled saw

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self renewing working tip mining pick

Mining or in situ disintegration of hard material – Cutter tooth or tooth head
Patent

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Self-advancing mine roof supports

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent

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Self-advancing mineral mining installation including tilting mac

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent

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Self-contained shim pack assembly

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self-powered portable rock crusher

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self-powered portable rock crusher

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self-propelled apparatus for cutting asphalt and concrete

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self-propelled civil engineering machine and in particular a...

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Reexamination Certificate

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Self-propelled concrete saw with forward motion speed...

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

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Self-propelled floor stripper

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent

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Self-propelled mining apparatus and method for cutting arched op

Mining or in situ disintegration of hard material – Processes
Patent

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