|  | E |
SECTION E — FIXED CONSTRUCTIONS

EARTH DRILLING; MINING

|  | E21 |
MINING

|  | E21B |
DEEP DRILLING; OBTAINING OIL, GAS, WATER OR SOLUBLE MATERIALS FROM DEEP WELLS

|  | E21C |
MACHINERY FOR, OR METHODS OF, MINING OR QUARRYING

|  | E21D |
SHAFTS; GALLERIES; TUNNELS; LININGS THEREFOR

|  | E21F |
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS [2]