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US4419642A Solenoid with saturable element 失效
电磁阀具有可饱和元件

Solenoid with saturable element
摘要:
A solenoid includes a coil, a pole assembly, an armature movable in the pole assembly and an air gap separating the armature from part of the pole assembly. A single mumetal washer may be fixed to the armature adjacent the air gap or a pair of mumetal washers may be fixed to the armature and to one of the pole parts on opposite sides of the air gap.
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