定位板托架并穿过车辆后横梁安装附接螺栓。
Position plate bracket and install attaching bolts through vehicle rear crossmember.
使用一个特制的钢托架来安装预制的锚固横梁的钢筋骨架，使其就位于上部结构内预定的位置上。
A special steel spreader beam was used to erect the fabricated cage in its proper position in the roadway structure.
把横梁用托架和螺丝固定。
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