| 摘要 |
<p>The device has a central core (210) comprising adjusting unit simultaneously adjusting height and/or length of multiple steps. A mold of staircase is pressed on the core. A nut is assembled on a screw spindle and supports a rotation axis carrying an end of an arm. Molds (115) are made of foam, polystyrene or composite material such as resin and glass fiber. Compensators are made of steel. A primary education arm is connected by connection pivot to another arm and fixed at its end by connection pivot with the cage. An independent claim is also included for a method for forming a staircase.</p> |
