The ground floor commercial space in a new residential building had a low ceiling and a tangled maze of plumbing, sprinkler and electrical conduits serving the residences above.

• 这家位于一座新的住宅楼底部的商业空间，天花板较低，上面布满了复杂的铅质管道，洒水装置以及电线管道系统，这些管道为整个居民楼服务。