| 摘要 |
<p>PURPOSE: A folding type multipurpose supporting board for a keyboard is provided to facilitate space utilization with a folding structure. CONSTITUTION: A roller, which is smoothly moved, is installed in a groove of a plane body. The roller and a folding type supporting board facilitate movement. A folding type multipurpose supporting board for a keyboard is loosed and fastened by using a hand screw(20). The height of the folding type multipurpose supporting board is controlled by using four hand screws.</p> |
