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Underground stress relieving drilling machine - has magazines with locating members to engage spigot and socket joints on drilling rods
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DEVICE FOR AUTOMATICALLY STOPPING A PRESSURIZED IMPACT DEVICE
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Tunnelling machine
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High pressure water pump - has high pressure oil pump feeding large diameter oil to water pressure convertor
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Working cylinder operation for casting production - two piston-cylinder chambers in frame connected with chambers of working cylinders
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Hydraulic or pneumatic rotary drive - threads of cylinder, piston and output-gear have twisted polygonal profiles
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ROTARY DRIVE
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HYDRAULICALLY OR PNEUMATICALLY OPERATED ROTARY DRIVE
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Improvements in or relating to machines for lowering heaving floors in underground mine workings
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Mining machine
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Device for regulating the feed speed of rock drilling machines with countersink hammers
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Traenkgeraet
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Hydraulically operated locking and pulling device for conveyor wagons
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Horizontal chain conveyor
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