upper chord member
... upper chord 上弦(杆) upper chord member 上弦杆件 upper clamp 上盘制动螺旋 ...
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缅甸卑谬依诺瓦底江大桥的上弦杆为钢箱杆件。
Top chords of Pyay Irrawaddy River Bridge in Myanmar are of steel box members.
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