在门形框架顶部使用一个横撑相连。

The portal frames are joined at the top by a cross member.

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约束的形式有采用螺杆和门形钢板两种。

There are two types of restraint-screw rod type and frame plate type.

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在厂房公用设施方面如工业用门、门形框架、升降柜、照明和平台的控制等。

Area in plant utilities such as industrial doors, door-shaped frame, lift cabinets, lighting and control platform.

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