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Often garbage may overflow bacause of the limited capacity of the garbage bag and even puncture it. And this pregnant garbage bag can solve the problem by ingeniously folding up the bag to enlarge the bag. Thus, when we pick it up the bag will be much larger in size.
Zhejing University
Hangzhou, China
Ying Fangtian
Zhejing University
Hangzhou, China
Guo jiahong
Zeng hui
Sun danhua
Liu lulu