| 摘要 |
PURPOSE:To eliminate constrained feeling of going up and down by extending the space of a way up step port by way of affixing steps after extending either of step plates of the stairways and drawing in the other. CONSTITUTION:Stairways are slanted and made sectors by extending main step plates A of one of the stairways and drawing in main step plates B of the other shorter. And it is arranged that none of all the stairways is similar to some other and all the stairways are different from each other in length and angle. Consequently, the space of the stairway entrance port is widened, people can go up and down, the stairways freely from the front or the side, and by way of fitting non-slip fittings, it is possible to stress the twist feeling even though the steps are horizontal. |
