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| − | + | Most accidents involving doing work in height and about ladders can also be averted as significantly are caused by both improper make use of or even poorly sited ladders that both slip get the facts or fall. | |
2016年7月22日 (金) 14:26時点における版
Most accidents involving doing work in height and about ladders can also be averted as significantly are caused by both improper make use of or even poorly sited ladders that both slip get the facts or fall.
