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arctic basin
4
ship observations
4
G1-922
3
Geography (General)
3
envir
3
geo
3
arctic
2
climate changes
2
digital television complex
2
ice age
2
ice concentration
2
ice thickness
2
iceberg
2
kara sea
2
nuclear icebreaker «50 let pobedy»
2
sea ice concentration
2
sea ice thickness
2
shipborne sea-ice observations
2
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