Topic
(*PERMAFROST
Construction Equipment
3
DRILLING
3
Ice and Permafrost
3
Materials & Supplies
3
Snow
(*DRILLING MACHINES
1
(*EARTH HANDLING EQUIPMENT
1
(*UNDERGROUND STRUCTURES
1
*DRILLING MACHINES)
1
*EARTH HANDLING EQUIPMENT)
1
*EXCAVATION
1
*FOUNDATIONS(STRUCTURES))
1
*TUNNELING MACHINES
1
BULKHEADS
1
CANADA
1
COLD WEATHER TESTS
1
CONSTRUCTION
1
CONVEYORS
1
CUTTING TOOLS
1
DRILLING MACHINES
1
DRILLS
1
EARTH HANDLING EQUIPMENT
1
EARTHWORK
1
ECONOMICS
1
FROST PENETRATION
1
HEATING
1
ICE LENSES
1
MAINTENANCE
1
MINERALS
1
OPERATION
1
PERFORMANCE(ENGINEERING)
1
PERFORMANCE(ENGINEERING))
1
PERMAFROST)
1
PREPARATION
1
ROCK
1
SAFETY
1
SOIL MECHANICS
1
SOIL MECHANICS)
1
SOILS
1
SOLAR RADIATION
1
SUPPORTS
1
Structural Engineering and Building Technology
1
TRANSLATIONS
1
TRENCHING
1
TUNNELING(EXCAVATION)
1
USSR
1
WINTERIZATION KITS
1