FR1069602A - Machine automotrice et automatique pour le havage, l'abattage et le chargement dans une taille de mine ou pour toute autre opération en galeries
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Machine automotrice et automatique pour le havage, l'abattage et le chargement dans une taille de mine ou pour toute autre opération en galeries
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E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
E21C29/02—Propulsion of machines for slitting or completely freeing the mineral from the seam by means on the machine exerting a thrust against fixed supports
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Mining & Mineral Resources
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Geochemistry & Mineralogy
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FR1069602D1949-04-211949-04-21Machine automotrice et automatique pour le havage, l'abattage et le chargement dans une taille de mine ou pour toute autre opération en galeries
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