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Process and device for spraying principally wet mineral lining and application materials
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Machine for applying concrete to tunnel walls - has universally mounted swing arm controlled by pneumatic cylinders
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Concrete pump valve with cylindrical seat - has axially movable stem with radially expandable sealing member and hard seat-clearing element
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COMPRESSED AIR SPRAYING MACHINE FOR CONCRETE, MOERTEL, O.AE. GOOD WITH DOSING DEVICE
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Cement spraying machine - with bucket wheel rotating on vertical shaft and fitted with pressure blower and spray pipe system
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Machine for spraying concrete etc. - has inflatable vertical hose valves in feeding enclosure intermittently interrupting material passage
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