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封冻期 fēngdòngqī
bridg.constr. freezing period
econ. ice-bound season
hydroel.st. duration of ice cover; freeze-up period; stage of freezing
tech. icebound season; ice laying; period of ice-cover; shut-down period
封冻期
: 6 phrases in 4 subjects
Desert science1
Electronics1
Technology3
Textile industry1