Auxiliary ventilation for mining; cladding material for flexible airducts; requirements, testing
€34.30
Power assisted air gates; travel-way air locks
MINE CAP LAMPS. SPECIFICATIONS.
€64.00
Auxiliary ventilation for mining; sheet airducts, with collars and loose flanges
Air regulating systems; air locks; construction and operation
€41.78
Roadway air doors with pressure reduction; double-wing type for travelling tracks
Mineral spirits; safety lamps mineral spirit; minimum requirements
Specification for light sources for miners' portable electric lamps
€269.00
Roadway air doors, swinging doors for monorails; principal dimensions
€24.39
ELECTRIC BULB FOR CAP LAMPS USED IN MINES AND QUARRIES.
€20.00
Warranty specifications for electric miner's lamps
Cap lamps; design and testing specification
Matériel des houillères. Ampoules pour lampes-chapeau. Cahier des charges.
€25.00
Bulbs for miners' electric lamps
Matériel des houillères. Ventilateurs électriques d'aérage secondaire, de 0.5 A 10 ch. Caractéristiques générales.
