73805140
Jun 7, 1989
COMMERCIAL EXPLOSIVES, SHAPED-CHARGES, AVALANCHE CONTROL CHARGES, DETONATORS, DETONATING CORDS, BOOSTERS, BLASTING MACHINES, MINE VENT DUCTING, PNEUMATIC DEVICES FOR LOADING EXPLOSIVES, PNEUMATIC CARTIDGE LOADERS, ELECTRONIC BLASTER'S GUIDES AND INSTRUMENTS FOR THE MEASUREMENT OF STATIC IN DYNAMIC STRESS IN ROCK
FirearmsUSE OF COMPUTER SOFTWARE TO DESIGN AND OPTIMIZE BLASTING AND TO CONTROL SEISMIC EFFECTS WHEN USING EXPLOSIVES AND BLASTING SERVICES
Building Construction and Repair