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- four wire cross bar switching system 四线纵横交换制
- When the emergency appears, starting the stretching wire switch at any position of accident spot can send out the stop signal. 当紧急事故发生时，在现场任意处启动拉绳开关，均可发出停机信号。
- A two wire SYSTEM then requires two twisted pair, and a four wire SYSTEM requires three twisted pair. 一个二线制系统两个双绞双绞线对，一个四线制系统需要三个双绞线对。
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- It is widely interested how to construct an active power filter to suppress the harmonics in three phase four wire system. 三相四线制系统中如何使用有源电力滤波器来抑制线路中的谐波，这一问题越来越被人们所重视。
- The use of the four wire method and the photoelectric segregation technology raises the test precision and disturbance resistibility. 采用四线法和光隔技术，提高了测试精度和系统的抗干扰能力。
- A circuit arrangement for deriving a phantom circuit. In four wire circuits, the two wires associated with the "GO" channel form one "side circuit", and those associated with the "return" channel form another. 用来派生一个幻象电路的电路结构。在四线电路中，与“去程”通道相关联的两线就形成了一个“半边电路”, 而与“回程”通道相关联的两线构成了另一个“半边电路”。
- Digital Main Network Switching Centre 数字主网络交换中心
- maritime satellite switching centre 海事卫星交换中心
- mobile services switching centre 移动业务交换中心
- This paper analyses the reason that neutral current is not zero when linear three phase system load connects to three phase four wire system source in Y connection. The resolution is also given. 分析了线性三相对称负载Y联接在对称三相四线制电源时 ;中线电流不为零的原因 ;并给出了解决的方法 .
- International Transit Switching Centre 国际转接交换中心
- provincial toll switching centre 长途电话省中心局
- exhaust by-pass valve control wire switch 排气旁通阀控制线转环
- automatic electronic data switching centre [计] 自动电子数据交换中心
- In four wire circuits, the two wires associated with the"GO" channel form one"side circuit", and those associated with the"return" channel form another. 在四线电路中，与“去程”通道相关联的两线就形成了一个“半边电路”，而与“回程”通道相关联的两线构成了另一个“半边电路”。
- automatic message switching centre [计] 自动报文交换中心
- The cable consists of four wires: two for data, one for power (+5 volts), and one for ground. 电缆由四电线所组成: 二为数据, 一为力量 (+5 伏特), 和他为地面。
- TDFW Three Dimensional Four Wire 四线三度重合磁芯存储器
- Phase four wire active power filter with one 基于单周控制的三相四线制有源电力滤波器
