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ледяной затор stresses
gen.	icejam (на реке)
agrochem.	ice blocking
construct.	blocking of ice; ice dam; ice jamming
ecol.	ice gorge
geol.	ice clogging
Makarov.	ice-dam stage
mil., tech.	ice-jamming; ice-blocking; ice-clogging; ice-jam
ocean.	ice gorge (на реке); ice jam (на реке)
tech.	ice jam; pressure ice; pressure ice-jam
ледяные заторы
Makarov.	ice jam

ледяной затор: 7 phrases in 3 subjects

Canadian	2
Hydraulic engineering	1
Military	4