发布时间:2025-01-20 10:52:17
电梯门头过梁就是用来固定层门门头机构的,只有在砖混结构的井道或者钢结构的井道才要求,其形式可以是混凝土的,也可以是用型钢来代替,目的是使层门门头机构能够牢固的固定,不会因为膨胀螺栓松动而使层门门头机构位置改变,造成安全事故。
BULL/公牛 B5030 新国标插线板 3位插 1.8米-适用对象
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