A device can achieve straight reciprocating motion in the energized state, as a function of push and pull outside load devices.
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A device can achieve one-way or two-way rotation, as a function of driving the rotation of outside objects.
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A device can achieve magnetic tongue flapping, which is typically used in printers.
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A device can produce a strong adhesive force in the energized state, stopping or moving absorbed objects by the force.
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