motor-field的用法和样例：
词汇搭配
- differential field motor 他激差绕直流电动机...
- dual-field motor 复激电动机
- constant field commutator motor 定激励整流式电动机...
- motor field 电机磁场
- rotary field motor 有旋转磁场的电动机...
- motor field failure relay 电动机磁场故障继电器...
- split-field motor 串激绕组分段式直流电...
- permanent field synchronous motor 恒磁场同步电动机...
- split field motor 分串激电动机,串励绕...
