bar magnet 磁棒 ; 磁条 ; 棒磁铁
bar-magnet velocity meter 磁棒测速计
a bar magnet 一条磁铁
Mini Bar magnet 小型棒形磁铁
welded bar magnet 焊接磁棒
Bar Magnet Rotate Platform 棒形磁石回转台
Has recorded bar magnet card 已录制的磁条卡
magnet bar 磁棒
My 12 year old had a lesson in his science course later that day that mapped magnetic fields of a little bar magnet. He showed me the results.
当天的晚些时候，我12岁的大儿子在他的自然科学课上绘制了一幅磁铁的磁场分布图。他向我展示他的成果。
My 12 year old had a lesson in his science course later that day that mapped magnetic fields of a little bar magnet.
当天的晚些时候，我12岁的大儿子在他的自然科学课上绘制了一幅磁铁的磁场分布图。
The Earth's magnetic field is roughly like that of a bar magnet, with two opposite poles.
地球的磁场大致就像是一块拥有两个磁极的磁铁。
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