仅在通电时吸引金属的磁铁
electromagnets — plural of electromagnet
通过在铁芯上缠绕线圈制成的临时磁铁；当线圈中有电流流过时,铁芯成为磁铁；电磁石；[化] 电磁体; 电磁铁
仅在通电时吸引金属的磁铁
A magnet which attracts metals only when electrically activated.
通过在铁芯上缠绕线圈制成的临时磁铁；当线圈中有电流流过时,铁芯成为磁铁
a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet
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