排水设施 drainage ; drainage facilities ; wastewater facilities

排水设施图 drainage plan

水管和排水设施 plumbing and drainage

地面水排水设施 surface water drainage

污水排放设施 sewage disposal facility

城市排水设施 urban drainage facilities ; city drainage facilities

多余的排水设施 redundant drainage facilities

室内给排水设施 plumbing

无排水设施的路槽 undrainedtrench