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]