| 摘要 |
PURPOSE: Prefabricated variable stairs are provided to regulate the height and angle of stairs. CONSTITUTION: The prefabricated variable stairs comprise the steps of placing clamps(4) having a pin on a straight tube(1) at regular intervals, connecting the pin of the side of the clamp(4) and an intermediate hole of a stair plate, keeping a front hole of the stair plate and a final hole of the lower stair plate regularly by a spacing bolt(6) and keeping the appointed height, angle and interval between stairs.
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