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Library is an important public resource for community and school. Stuffs need to maintain and arrange books regularly. The traditional book cart can only be used for transmit books. An extra ladder is required when the book position is too high, which is troublesome. The Book Cart with Ladder attaches a ladder at front of the cart, which can be folded back normally and pulled out in need. At the same time, the ladder pat can be used as a seat too.
Dalian Minzu University
Dalian, China
Baihan Zong,
Dalian Nationalities University
Zhen Zhang,
Dalian Nationalities University
Yidan Che,
Dalian Nationalities University
Caiwen Zhao,
Dalian Nationalities University
