three-wire system [电] 三线制
three wire measurement 三线测螺纹法
three-wire generator [电] 三线发电机
three wire system 三线系统 ; 三线制
phase three wire system 单相三线制
three wire method 三线测螺纹法
three-wire switch 三线开关
New variable is introduced based on energetic equation, the period of vibration of three wire pendulum is studied using the method of rotating vector.
由能量方程出发，引入新变量，用旋转矢量法讨论了三线摆大角度摆动时的周期。
Three prisoners escaped by crawling under the wire.
三个囚犯从铁丝网栅栏下钻出去越狱了。
In order to make more effective control of universal power quality controllers (UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper.
为了对通用电能质量控制器直流侧电压进行更为有效的控制，提出一种用于三相三线通用电能质量控制器(UPQC)直流侧电压控制的外环模型。
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