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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.
youdao
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牢房的门是把金属板焊在铁框架上制成的。
The cell door was sheet metal welded onto a frame of iron.
youdao
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牢房的门是把金属板焊在铁框架上制成的。
The cell door was sheet metal welded onto a frame of iron.
youdao