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
E21C35/18—Mining picks; Holders therefor
E21C35/19—Means for fixing picks or holders
E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
E21C35/1936—Means for fixing picks or holders using bolts as main fixing elements the picks having a square- or rectangular-section shank
Systeme mecanique comprenant un dispositif de liaison entre une piece d'usure et son support, godet d'engin de travaux publics et procede de mise en oeuvre d'un tel systeme