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《建筑施工升降机安装、使用、拆卸安全技术规程》(JGJ215-2010):当遇大雨、大雪、大雾或风速大于()m/s等恶劣天气时,施工升降机应停止安装作业
A . 20
B . 13
C . 10
D . 8
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