CPC Subgroup
E21C 47/10 for quarrying stone, sand, gravel, or clay
Full Title
Machines for obtaining or the removal of materials in open-pit mines (obtaining peat E21C49/00) > for quarrying stone, sand, gravel, or clay
E21C 47/10 Machines for obtaining or the removal of materials in open-pit mines (obtaining peat E21C49/00) > for quarrying stone, sand, gravel, or clay