问题
填空题
对于主提升，当提升容器过卷时，则不实行二级制动，而将三倍制动力矩一次投入，称为（）制动。
答案
参考答案：一级
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对于主提升，当提升容器过卷时，则不实行二级制动，而将三倍制动力矩一次投入，称为（）制动。
参考答案：一级
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