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drainage gallery
desert. 排水走廊
el. 污水道; 疏水沟
eng.geol. 排水盲硐; 集水廊道
hydroel.st. 排水廊道
tech. 排水巷道; 排水平峒; 疏干巷道; 排水管廊
drainage gallery: 5 phrases in 2 subjects
Hydroelectric power stations2
Technology3