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儿童过滤水杯 / 儿童

儿童过滤水杯
儿童过滤水杯

This is a children's filtering cup. Its filtering principle is to filter layer by layer with a five-stage filter screen. The filtering method is concentrated on the cup cover and the dirty water in the cup is filtered into pure water by drinking water.

University

北京城市学院

北京城市学院
北京市, China

俊斋 羊,
北京城市学院