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The design features of standardization, generalization and serialization of main parts on electric locomotive in China are briefed, the current situation of 3 types freight electric locomotive s and 5 types passenger electric locomotives is analyzed, and the necessity of preparing AC DC drive electric locomotive spectrum in China is stated as well.

简述了我国电力机车主要零部件的标准化、简统化、系列化设计特点，分析了货运电力机车3种车型和客运电力机车5种车型的现状，表明了我国交直传动电力机车型谱化的必要性。

Product quality is stable, best-selling domestic products, Appliances are appliances, electric open bottle, coffee pot, water dispensers, disinfection cabinet, electric steamer, ovens, fat fryers, electric irons, electric appliances, such as Express Kettle and air conditioning manufacturers the ideal accessory products.

产品质量稳定，产品畅销国内，是家电用器、电热开水瓶、咖啡壶、饮水机、消毒柜、电蒸锅、烤箱、油炸锅、电熨斗、快速电水壶等电热器具和空调生产厂家的理想配套产品。

In addition, only the impact of China's electric tools electric drill, electric drill, electric hammer and a small number of varieties have electronic speed control functions, most are single-speed products, users should not meet the level of product requirements.

此外，只有中国的电动工具冲击电钻，电钻，电锤和少数品种有电子调速功能，大部分是单速的产品，用户应不符合产品要求的水平。

Grass trimmer, hedge trimmer, blower/vacuum, electric lawnmower, electric lawnraker, electric hoe, electric chain saw, gasoline lawnmower, gasoline blower, multi-function saw.

3F86 3G85 尼龙绳割草机，修枝机，树叶吹吸机，电动割草机，耙草机，翻土机，电链锯，汽油割草机，汽油吹风机，多功能锯。

Then the error sources of the reaction type and electron type electric energy mete were analyzed and the theory analysis result through the concrete test have been proved. At last, the main conclusion has been drawn. When the induction type electric energy meter measures harmonics energy, the negative error characteristic appears. The higher the frequency of harmonics is, the greater the error is. The electron type electric energy meter can measure harmonics energy accurately in general cases. Except thermo-electrical conversion type electron type power meter, reaction type and electron type electric energy meter can measure direct current power.

本论文通过分析感应式和电子式电能表的工作原理推导出了电能表计量电能的数学模型；分析了感应式和电子式电能表的误差来源以及谐波对计量的影响，并通过具体的试验对理论分析结果进行了验证；得出了如下谐波对电能表计量影响的主要结论：感应式电能表计量谐波电能时，呈现负的误差特性，谐波频率越高，误差越大；电子式电能表在其频响范围内可以准确计量谐波电能。

The current are outputted to the electric engine after capacitance commutation, N pairs of electric engine coils are connected in series by two, 2N coil diodes are connected together with reversal direction; N PNP type triodes are connected together on the N pairs of electric engine coils in series; 2N switcher are connected at the lower part of the N pairs of electric engine coil in series; 2N the first one-way diode are connected between the PNP type transmitting pole and the drain electrode of the switchers; N the second one-way diodes are connected together between the collecting electrode of PNP type triode and the source electrode of 2N switcher.

电流经串联电容整流后输给电机，N双的电机线圈二二并联，2N个线圈二极管相互反方向连接；N个PNP型三极管串联在N双的电机线圈的上部；2N个开关器件串联在N双的各个电机线圈的下部；2N个第一单向二极管接在各PNP型三极管的发射极和各开关器件的漏极之间；N个第二单向二极管接在N个PNP型三极管的集电极和2N个开关器件的源极之间。

Electric product line has:electric hot water, coffee, electric oven, electric furnace, etc. Pa Electrothermal Products.

电热产品系列有：电热水罉，咖啡罉，电焗炉，电扒炉等各类电热产品。

According to the selected electric actuator determine the electrical parameters Because of different electric actuator manufacturers have different electrical parameters, design selection Butterfly Valves generally takes time to determine their electrical parameters, mainly electric power, rated current, secondary voltage control loop, are often negligent in this regard, the results of control system and the electric actuator parameter does not match the space-time caused by the work of opening trip, fuses, fuse, thermal overload relay protection is like a take-off and other failures.

根据所选电动执行器确定电气参数因不同电动执行器厂家的电气参数有所差别，所以设计选型时一般都需确定其电气参数，主要有电机功率、额定电流、二次控制回路电压等，往往在这方面的疏忽，结果控制系统与电动执行器参数不匹配造成工作时空开跳闸、保险丝熔断、热过载继电器保护起跳等故障现像。

Recent years is because of the electric power electronics piece the printing machine for electric power for making, base onning electric power electronics electric circuit converting, calculator technique, micro-electronics technique, network communication waiting technique continuous changes and improvements, adopting have noing the stalk spreading moving technique emerge with the tide of the times, and acquire the quick development, already predominant machine main current of modern printing.

近年由于电力电子器件制造，基于电力电子电路的电力转换，计算机技术，微电子技术，全数字化、网络通讯等技术日新月异，采用无轴传动技术的印刷机应运而生，并获得迅速发展，己主导现代印刷机械主流。

Professional Brand include: electrical and fixed projector hanger, electric lift bed, electrical pylon, electric lift anti-theft counters, wireless infrared remote control, projection equipment vehicles, electric curtains, TV stand (under the crane type and wall type), senior electric projection screen, computer locks, such as teaching modern business applications.

专业品牌包括：电动和固定投影机吊架、电动升降台架、电器吊架、电动升降防盗柜、无线红外遥控器、投影仪器车、电动窗帘、电视机支架、高级电动投影幕、电脑锁等现代商务教学应用设备。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48