新颖性:The device (1) has a rotatable support unit (2) that is provided for supporting a side portion (4) of support structure. Receiver units (8) of support unit are provided for receiving the side portion, and are pivoted moveably between two positions. An assembly frame (6) is pivotably supported on the support unit by using a rotary bearing, and is rotated into specific position by ........(请QQ直接登录后查看全文)