| 摘要 |
<p>A collapsible ladder (100) comprises a number of stile sections (130a, 130b, 150a, 150b) interconnected by ladder steps (110c, 110d, 110e) to form U-shaped ladder sections. Adjacent stile sections have inner and outer diameters arranged to allow telescopic insertion into one another, and the stile sections have a length at least equaling twice the distance between two adjacent ladder steps when the ladder is in an extended position.</p> |
