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Various accidents come about by improper usage of a ladders, or men and women trying to use a seat, stool or other object to just do the job at height.
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Extension ladders are usually separated into numerous pieces, that you can pull-up and slide for easy storage collectively. It can be only extended to its optimum length by sliding the pieces apart both by hand or utilizing a pulley system.

2016年7月25日 (月) 01:48時点における版

Extension ladders are usually separated into numerous pieces, that you can pull-up and slide for easy storage collectively. It can be only extended to its optimum length by sliding the pieces apart both by hand or utilizing a pulley system.

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