对双闭环直流调速系统进行辅助设计，的翻译：Design of double closed-loop DC speed-regulating system for secondary, 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Double Loop DC Motor System-aided design,

Design of double closed-loop DC speed-regulating system for secondary,

Carries on the assistance design to the double closed loop cocurrent velocity modulation system,

In the double-closed-loop dc speed control system, designed to assist

Design of double closed-loop DC speed-regulating system for secondary,