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| − | + | Most accidents involving doing work in height and in ladders may possibly also be prevented as significantly are due to both improper make use of or poorly sited ladders that both slip look these up or fall. | |
2016年7月18日 (月) 00:34時点における版
Most accidents involving doing work in height and in ladders may possibly also be prevented as significantly are due to both improper make use of or poorly sited ladders that both slip look these up or fall.
