For such a low frequency, which would only be resorted to when it is indispensable for the operation of ordinary motors, I would use a secondary winding wound from a wire 50 miles in length.
Primary outcome will be side effect distress and frequency, and secondary outcomes will be QOL and medication adherence.
主要的结果将是副反应的痛苦和频率，其次是生活质量和药物的持续。
3
As an example, Finite element analysis and optimization design are made to a voltage transformer of rating primary voltage 35KV, rating secondary voltage 100V, rating frequency 50HZ.