| 摘要 |
An attic ladder has a frame, a first side rail, a second side rail extending in parallel relationship with the first side rail and pivotally interconnected to the frame at an upper end thereof, and a plurality of steps extending between the side rails. Each of the steps are formed of a polymeric material. The side rails have a curved outer surface. A slidable base rail is mounted at a bottom of each of the side rails so as to support a shoe at a bottom thereof.
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