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The stairs bookcase / bookcase

The stairs bookcase
The stairs bookcase

Will the bookcase and stair combined on the bottom of the cabinet frame drawing change number and trapezoid, which is convenient for people to get high books, you can also with the ladder into appropriate reading seats. Bottom plus pulley structure, put the book is also convenient to pull out.

University

Hebei University Of Engineering

Hebei University Of Engineering
Handan, China