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BEIEN MASCHFAB
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BEIEN MASCHFAB
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E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
E21C25/56—Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyor or by a guide parallel to a conveyor
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Mining & Mineral Resources
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FR1044657D1950-04-191951-04-13Perfectionnements apportés aux procédés et dispositifs pour abattre du charbon ou d'autres minerais
ExpiredFR1044657A
(fr)