Although the absolute cost of four - wire circuits is higher than that of two - wire circuits, they offer considerably improved performance.
尽管四线电路的绝对成本高于双线电路，但它显著地改进了性能。
Firstly, the existing methods of the three phase power measurement in the teaching materials are introduced. And then another three connection methods are suggested for three phase four wire circuits.
首先介绍了现有教材中已给出的三相电路功率的测量方法，进而提出了三相四线制三相电路功率测量的另三种接线方法。
Its comprehensive coverage focuses on printed circuits, integrated circuits, contact materials, semiconductors, wire, bonding, brazing, soldering, and welding.
它的广泛报导集中在印刷电路、集成电路、连接材料、半导体、导线、粘结、钎焊、焊锡和焊接。
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