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sewer tunnel
agric. 污水管隧道
eng.geol. 污水隧洞; 污水隧道
hydroel.st. 下水道; 排水隧洞
tech. 污水管沟; 污水隧道; 下水隧洞; 污下水道隧洞
sewer tunnel: 2 phrases in 1 subject
Technology2