The d. c. traction portion of which comprises current and voltage feedback to form double closed-loop speed adjustment system.
该机的直流牵引部采用具有电流反馈和电压反馈的双闭环调速系统。
The d. c. traction portion of which comprises current and voltage feedback to form double closed-loop speed adjustment system.
该机的直流牵引部采用具有电流反馈和电压反馈的双闭环调速系统。
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