|
adjustable rung by rung to almost double
its height. According to the type of work the user can always adjust
the ladder to the most convenient height
|
 |
|
One ladder substitutes a complete
range of step
ladders
| |
can be telescoped upwards so that the
height of each leg of the ladder is adjustable. It
is this facility which makes it useful on uneven ground like a
slope or even on staircases
|