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在登高作业时,常用到单梯。《电业安全工作规程》(热力与机械部分)规定:梯子与地面的倾斜角度为60°左右。但事实上谁也不会随身带一只量角器去测量
In ascension homework, often used to single ladder. “Electrical work safety regulations” (thermal and mechanical part) provides: the ladder and the ground tilt angle of about 60 °. But in fact no one can carry a protractor to measure