在IBM的令牌环型网络中，一帧信息在向目的地传送路径上所通过的桥接器个数。
In the IBM Token-Ring Network, the number of bridges through which a frame passes on the way to its destination.
CPU连接到主总线，而总线桥接器控制CPU与本地总线和网络总线的接通与断开。
CPU is connected to main-bus and bus-bridge controls the connections between main-bus and two sub-buses.
CPU连接到主总线，而总线桥接器控制CPU与本地总线和网络总线的接通与断开。
CPU is connected to main-bus and bus-bridge controls the connections between main-bus and two sub-buses.
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