solely by slitting (rods, drums, for same E21C25/10; saws, discs, wheels E21C25/18; chains, chain guides, for same E21C25/28)

Full Title

Machines which completely free the mineral from the seam > solely by slitting (rods, drums, for same E21C25/10; saws, discs, wheels E21C25/18; chains, chain guides, for same E21C25/28)

Child Classifications

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• E21C 27/04 by a single chain guided on a frame with or without auxiliary slitting means
• E21C 27/08 with additional means for cutting the mineral into blocks