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E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
E21C35/08—Guiding the machine
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FR759144D1932-10-221932-10-22Perfectionnements aux haveuses
ExpiredFR759144A
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