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Frostboden m m -s
construct. frozen earth; nival soil
earth.sc. frozen soil
environ. permafrost
mining. frost soil
nat.res. cryogenic soils; gelic soils (soils having permafrost); pergelic soils (soils having permafrost)
tech. frozen ground
Frostboden: 3 phrases in 2 subjects
Construction2
Soil science1