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滞洪区
bridg.constr.	retention basin
el.	stagnant area
environ.	conservation area
hydraul.	drawdown zone
hydroel.st.	detention basin; retarding basin; flood detention area; flood retarding basin; flood retention basin
tech.	detention area; flood detention basin; flood detention district; rainwater retention basin
滞洪区〔水库〕
environ.	retarding basin

滞洪区: 2 phrases in 2 subjects

China	1
Desert science	1