239000003795chemical substances by applicationSubstances0.000description1
238000005065miningMethods0.000description1
238000013138pruningMethods0.000description1
Classifications
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21C—MINING OR QUARRYING
E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face
Machine permettant de faire pivoter autour de leur axe des tubes de section rectangulaire ou carree de poids eleve et de grandes dimensions,en vue de leur usinage.