Steel anchor box structure was used in the cable-tower anchorage zone.
天津保定桥为独塔单索面钢箱梁斜拉桥，索塔锚固区采用钢锚箱结构。
The steel anchor box of the tie ho arch bridge has the characteristics of carrying lug loads and fitting into a small space. This adds to the difficulties in design and production.
系杆拱桥钢钻箱，具有“承受大吨位，适应小空间”的特点，给设计和制造增加了难度。
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