| 摘要 |
The horizontal cross braces are positioned on opposite sides of the vertical beams, the distance between them being equal to the vertical beam width. Each cross brace comprises two fixable side pieces or end parts (4, 5) and an intermediate surface part (2) supporting the plaster plate. Several equidistant holes (8, 9) or slots in each end part fix the vertical beams with the actual central distance between them. |
