According this artical it may 有害. quote:

来源: WayCool 于 2009-04-14 11:06:01 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (233 bytes)

Detached Particle Agglomerations – A common risk associated with using magnetic separators is the possibility of particles becoming detached from the magnet and washed downstream in mass, potentially entering a sensitive component.

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• 实际上是不可能的。 -coorslight969- ♂ 给 coorslight969 发送悄悄话 (114 bytes) () 04/14/2009 postreply 11:15:14

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