该总线桥是某型协调控制器系统的通讯核心，实现了系统下层的背板总线、背板总线管理器与上位机epp并口之间的协议转换以及通讯仲裁功能。
This bridge is the core of communication of the controller system, it connects the bottom level backplane bus, backplane bus controller, and PC EPP parallel port.
内外弧形端梁与上下层伸缩式主梁构成的桥架结构紧凑，重量轻巧，美观实用。
The bridge structure is formed by the inside and outside arc end carriage and the upper and lower retractable main girder, with compact structure, light weight and beautiful and dignified appearance.
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