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Speaker-type rhythm musical instrument
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Magnetism science teaching material
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Wire winder
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Wire winder
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Teaching material for electronic circuit
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Disconnection detecting device
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Soldering iron
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Punch part reshaping device for punched tape
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Winding/rewinding controller
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Winding/rewinding device
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Ac peak value checking device
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Synchronous monitoring device
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Action monitor
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Tension controller
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Movement monitor
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Automatic device for light masking spectacles
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Variable ac stabilized power supply unit
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Alternating-current stabilizing power unit
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Device for controlling and converting electric power
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Dccac converter including transformer
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