| 摘要 |
PURPOSE:To improve the mechanical rigidity and to prevent resonant noise is order to improve the performance by shaping a front board made of plastic in a curved surface and setting reinforcing limbs contacted to the arc of the curved surface. CONSTITUTION:A pair of reinforcing limbs 8 are attached in the middle of the back of a front board 7 made of plastic shaped into curved surface. The front board 7 is also fixed to a cabinet with screws for fixation through mounting holes 9 opened at the four corners and in the middle of each side. |
