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Extension ladders are separated into two or three pieces, that you can pull-up and slip jointly for straightforward storage. It can be just expanded to its highest length by slipping the pieces aside either manually or with a pulley technique.
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If you are susceptible to dizzy spells at high heights usually do not climb a ladder. Never ever perform with a ladder in a substantial wind or electric storm.

2016年7月19日 (火) 20:06時点における版

If you are susceptible to dizzy spells at high heights usually do not climb a ladder. Never ever perform with a ladder in a substantial wind or electric storm.