| 摘要 |
The step has an upper tread plate (3) and a side plate (4) which with its upper insert edge associated with a fixing groove (7) on the underneath of the tread plate forms a cylindrical rounded head part (8) whose convex outer contour (9) matches the internal cross-section of the groove. The tread plate has an additional connecting groove (13) running along its rear longitudinal edge (12). the tread plate and side plate and the fitting accessories are combined into one packaged unit. |
