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многолетнемёрзлый грунтstresses
agrochem. everfrozen soil
construct. eternally frozen ground; constantly frozen ground; perpetually frozen soil; permanently frozen ground; perennially frozen ground; pergelisol
hydrol. eternal frozen ground
tech. permafrost soil; permafrost
многолетнемёрзлый грунт: 12 phrases in 4 subjects
Construction6
Makarov1
Oil and gas3
Road works2