Improvements in frontal sliding devices for the construction of underground hollow spaces (Machine-translation by Google Translate, not legally binding)
ES395361A1
Procedure and device for the extraction of carbon in mines of exploitation with long front (Machine-translation by Google Translate, not legally binding)
ES365532A1
A weaponing device brings the operating position of a mine conveyor and similar. (Machine-translation by Google Translate, not legally binding)
ES334272A1
A arrivaling device mounted in the exploitation gallery. (Machine-translation by Google Translate, not legally binding)
ES330922A1
A connecting device for threaded sections for mineral transportation media in tilted stratification places. (Machine-translation by Google Translate, not legally binding)
ES330608A1
A functional railroad operating device. (Machine-translation by Google Translate, not legally binding)
ES330465A1
A chisel device for carbon and similar scrapers. (Machine-translation by Google Translate, not legally binding)
ES329006A1
A correction device for mine conveyors. (Machine-translation by Google Translate, not legally binding)
ES329016A3
Mechanism of impulsion for machine of extraction and-or carrier of fund. (Machine-translation by Google Translate, not legally binding)
ES328531A1
An extraction apparatus without carbon conveyor in a scared area. (Machine-translation by Google Translate, not legally binding)
ES328198A1
A depressoring device for carbon extraction machines. (Machine-translation by Google Translate, not legally binding)
ES328043A1
A device for the extraction of carbon in an inclined field. (Machine-translation by Google Translate, not legally binding)
ES327814A1
An extraction device for underground exploitation in mines. (Machine-translation by Google Translate, not legally binding)
ES325131A1
A hydraulic elevator device for mina transporters. (Machine-translation by Google Translate, not legally binding)
ES324562A1
A scraper machine for carbon. (Machine-translation by Google Translate, not legally binding)
ES324431A1
A device to tension and join scraper chains. (Machine-translation by Google Translate, not legally binding)
ES323522A1
A driving device for articulated bars for the progressive hydraulic subterrane entibation. (Machine-translation by Google Translate, not legally binding)
ES310237A1
A channel device for chain scrapers transporters. (Machine-translation by Google Translate, not legally binding)
