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− | + | Most mishaps involving working in height and on ladders can also be avoided as lots of are due to both improper use or poorly sited ladders that both slide content or fall. |
2016年7月24日 (日) 20:10時点における版
Most mishaps involving working in height and on ladders can also be avoided as lots of are due to both improper use or poorly sited ladders that both slide content or fall.