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When we used cleaned with a broom at home, we could always find twisted things or hair adhering on the broom. We could only use our hands to clean them a little by little which is quite unsanitary. Thus we think of hair combing and hope we are able to “comb” off the dirt on the broom. We add a comb-shape object in the dustpan. Simply stroke the broom through the “comb”, the dirt can be removed and stored in the dustpan conveniently.
YE Feng LI Ke WEI Min