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*ICE
THICKNESS
4
CRYSTAL STRUCTURE
2
Ice and Permafrost
2
OCEANS
2
POLAR REGIONS
2
SALINITY
2
Snow
2
TEMPERATURE
2
TENSILE PROPERTIES
2
VELOCITY
2
*CONSTRUCTION
1
*PROJECTILES
1
*PUMPS
1
AIR DROP OPERATIONS
1
ANTISUBMARINE WARFARE
1
ARCTIC OCEAN
1
ARCTIC REGIONS
1
Ammunition and Explosives
1
BLUNT BODIES
1
CLIMATE
1
COMPUTER PROGRAMS
1
CONFIGURATIONS
1
CONICAL BODIES
1
CONSTRUCTION
1
CORE SAMPLING
1
CYLINDRICAL BODIES
1
DEGRADATION
1
DENSITY
1
DIGITAL COMPUTERS
1
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