Engineering ?
回答 (2)
2021-04-11 2:14 pm
To convert electrical energy into mechanical energy.
2021-04-11 4:05 pm
to actuate a mechanical devise.
收錄日期: 2021-04-11 23:38:28
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https://hk.answers.yahoo.com/question/index?qid=20210411061211AAtHdbd