Working at heights can create additional tool hazards.

高空作业会产生其他的工具危险。

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This standard is developed to improve the approval procedure for working at heights, put and end to the incidents/accidents occurred during the works at heights, and ensure the personnel safety.

为持续改进高处作业审批工作程序，杜绝高处作业事故/事件的发生，保障作业人员生命安全，制定本规范。

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And face it, no matter how fearless you are working perched at precarious heights, the fewer trips up and down a ladder, the safer you'll be.

面对现实吧，不管你敢不敢在危险的高处工作，越少上下梯子，你就会越安全。

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The Highways Agency said installing new gantries across the motorway on Friday and Saturday night involved contractors working at heights of more than 14m (45ft) and full closures were necessary to ensure their safety.

BBC: Birmingham motorway congestion 'harming economy'