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H01H50/18—Movable parts of magnetic circuits, e.g. armature
H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed
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Physics & Mathematics
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Electromagnetism
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Electromagnets
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Push-Button Switches
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Switches Operated By Changes In Physical Conditions
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