In electronics , undesirable low frequency currents interfering with a desired signal , and usually caused by a poorly screened alternating mains supply 在电子学领域，一种不希望发生的低频电流，它干扰所要求的信号。通常这种现象是由于交流供电线路屏蔽不良引起的。
Accessible non - current - carrying metal parts of the luminaire shall be connected to the grounded conductor of the supply circuit through a 3 a quick - acting plug - type fuse 将灯具上的可接触的非载流金属部件用3a快速反应插头式保险丝与供电线路上已接地的导线相联接。
10 . physical trade and the less visible trade in services require a financial infrastructure in the same way that new buildings need plumbing and electrical wiring 有形贸易与服务业方面的无形贸易需要金融基础设施的支持，就如新的建筑物需要管道设备与供电线路一样。
It is impossible without any fault and blackout in power system , but it is absolutely possible to reduce the number and time of fault and restore the power supply quickly 要求供电线路没有停电事故是不可能的，但应用配电自动化达到停电频数少、时间短、供电恢复快则是完全有可能的。
They have painted the living room and tidied the garden in order to sell the house , but it ' s really only window dressing because the roof needs attention and the electric wiring is still unsafe 为了出售房子他们粉饰了起居室并整理了花园，不过那其实只是粉饰门面而已，因为房顶需要修缮，供电线路还不安全。
With the elevation of the power factor , stator electric current decrease obviously and its range is about 20 % . so voltage loss and electric power wastage decrease effectively on electromotor power supply circuitry consequently 随着功率因数的提高，定子电流明显的减小，减小幅度在20左右，从而有效地减少电动机供电线路的电压损失及电力损耗。
On the basis of the principle of the above , it designs and develops the integration system of the power supply line design and the project preliminary budget , and puts forward the design and optimization technology of oracle database among them 基于以上的原理，设计和开发了供电线路设计与工程概预算一体化系统，其中提出了oracle数据库的设计与优化技术。
This paper analyzes the existing problems about the software of the power supply line design and the project preliminary budget at present . it brings forward a kind of new design method of software based on mode of network that can make them integrated effectively and perfectly 本文分析了当前供电线路设计与工程概预算软件所存在的问题，提出了一种新的基于网络模式的，两者有效、完美地集成一体化的软件设计方法。
A new distribution model that small capacity transformer and short low voltage line is presented after analyzing the power supply ability of distribution network . it is found that this method is better than that of past through comparison between them . the advice that the fifth item of standard dl / t559 - 1996 should be modified is also presented 从理论上分析了配电网的供电能力，指出了在现有配电模式下配电网的供电能力是比较差的，提出了小容量变压器、多布点、缩短低压供电线路的配电模式，并将这一配电模式与现有配电模式下的常用降损节能措施进行了分析比较，证实了采用这一配电模式的优越性。
