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Let us go via the A-frame ladder for illustration. This kind of ladder is recognized as to turn out to be one the most frequent versions. It can be regarded as the A-Frame ladder due to its letter A shape.
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Faulty, damaged or even bent ladders are accountable for a significant percentage of the incidents that take place when functioning at elevation.

2016年7月19日 (火) 23:23時点における最新版

Faulty, damaged or even bent ladders are accountable for a significant percentage of the incidents that take place when functioning at elevation.