It is practical in electric engineering computation to calculate the electric voltage fall and power loss through calculating the power distribution of the loop power networks.
通过计算环式电网中的功率分布，来计算电路中的电压降和功率损耗，对于现场电气工程计算具有一定的现实意义。
Measuring the big-electric current and the big voltage is a difficult work in engineering measurement.
大电流、大电压的测量一直是困扰工程测量学的难题。
The use of engineering plastics voltage 220V pump, for family selection.
采用220V电压的工程塑料泵，可供家庭选用。
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