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The design solve a problem of door and wondows' setting up inconvenience . the main idear is the specific flexible structure of door and windows' setting up.
whenever you install the tensile door or windows .you can set them up or take them down conveniently.
IS your door and windows closed when summer is coming ?do you close your door and windows when winner is coming ?
Tiaobo Jiang Zhenwen Mao Xiping Fang