Main characteristics and performance parameters are given for the modularized SS(subscript 7E) AC/DC electric locomotive. The functions and characteristics of main systems are also stated.
介绍了模块化SS（下标7E）型交直电力机车的主要特点和性能参数，并阐述了机车各主要系统的功能和特点。
Based on the characteristics of DC electric arc furnace the heat transfer and the measures to improve it are introduced.
从直流电弧的特征出发，分析了直流电弧炉的传热及改善直流电弧炉传热的途径。
Proceed from the analysis of loads and characteristics of the motor, the reference opinion about the selection of DC motor for electric drive drilling rig is given.
从分析负载及电动机特性出发，提出直流电动机选型参考的意见。
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