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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应用平均场理论，在横场伊辛模型的框架内，研究了退极化场对铁电超晶格热力学性质的影响。

Using mean field theory, the effects of depolarization field on the thermodynamic properties of ferroelectric superlattice is studied within the framework of the transverse Ising model.

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沿车体纵、横及水平方向组成一定数量的封闭框架，并由网格梁配合承载蒙皮实现了这一承载方式。

This bearing way has been realized by a certain number of closed frames in the longitudinal, lateral and horizontal directions of body and grid beams together with bearing cover.

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