b double meaning in Chinese

二垒安打

Industrial ethernet network of the computer monitoring and control system for ship lift of gaobazhou water control project is made up of a and b double redundancy ring optical fiber networks with better reliability and flexibility
摘要高坝洲升船机计算机监控系统工业以太网由a 、 b双冗余环形光纤网络组成，具有较高的通信可靠性和灵活性。
Due to a & b double flats setting of stp ( signalling transfer point ) in different place , and working on mode of payload - sharing on signalling links ( couple links ) between sp ( signalling point ) and stp , the calling signalling sequence cannot be collected completely from single stp . thus it is difficult to synthesize signalling affair in the signalling supervision system . the first , this thesis illuminateds network architecture of no . 7 signalling network and no . 7 signalling centralized supervision system
由于七号信令网的信令转接点设备stp ( signallingtransferpoint )采用a 、 b双平面异地设置，下一级的信令点设备sp ( signallingpoint )至上一级的一对stp之间的信令路由采用负荷分担方式工作， sp至stp对的负荷分担链路形成耦合链路，导致在一个stp处无法采集到完整的呼叫信令序列，这样就给监测系统核心部分之一的信令事件合成带来了极大的难度。