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根据建设部《城市建设统计年报》以及31个城市的抽样调查，对我国不同规模、不同地域城市公厕的数量和种类构成差异进行了统计分析。
According to the “City Construction Statistics Annual Report” of the Ministry of Construction and sample surveys in 31 cities, statistical analysis was made on the differences in the number and types of public toilets in different scales and regions in China.