FI-SubClass-Choice

「SubClass」 in E21 can be selected for this page.

Select the desired 「SubClass」.

  • E21B
  • EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS[5]
  • E21C
  • MINING OR QUARRYING
  • E21D
  • SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)[2,6]
  • E21F
  • SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS[2]
    TOP