magnets and magnetic fields
Magnets and magnetic fields（磁铁或磁场） Keep your device away from magnets or magnetic fields (请使您的设备远离磁铁或磁场)。 .
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magnets and magnetic fields
磁铁和磁场
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Helium-cooled superconducting coils, typically made of an alloy of niobium and titanium encased in copper cladding, create magnetic fields ten times stronger than similar-size permanent magnets can muster.
ECONOMIST: Inside story