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- 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”。
- 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 .
- 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”。
- TDFW Three Dimensional Four Wire 四线三度重合磁芯存储器
- 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。
- 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
- voice frequency four wire patching bay 音频四线调度架
- three-phase four wire installation 三相四线装置
- four wire automatic signal converter 四线自动信号变换器
- four wire voice frequency path bay 四线音频调度架
- four wire voice frequency telephone repe 四线制话频电话中继器
- It is clear to all of us that two plus two is four. 二加二等于四对我们大家都很清楚。
- Each of the four cables contains26,108 lengths of wire. 这四根缆索。每一根都包含有26,108根钢丝。
- He wove four plots together into a novel. 他把四条情节编成一部小说。
- We have tea at four o'clock in the afternoon. 我们在下午四点钟喝茶。
- The town boasts four swimming pools. 这座城镇以拥有四个游泳池而自豪。
