| 摘要 |
{PG,1 An electromagnet having a stationary core and a movable armature, each having three pole faces, forms a magnetic circuit having three substantially parallel legs when the core and the armature are brought together. The center leg of the magnetic circuit includes a demagnetizing airgap combined with a non-magnetic coating on a center pole face, which coating is more resistant to wear than the material of the uncoated pole faces.
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