CPC Subgroup
E21F 17/08 Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)
Full Title
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) > Distributing means for power supply in mines > Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)