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Three-type waveform signal generator
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Ultrasonic humidifier
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Delayed illuminating lamp capable of brightening and dimming gradually
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High-power ultrasonic mosquito and cockroach expeller
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Charger capable of respectively charging nickel-cadmium/nickel-hydrogen rechargeable batteries
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Pointer type universal meter direct-current booster
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Identifier for same-name ends of coil windings of transformers
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Touch alarm of travel suitcase
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Low-voltage alarm circuit with general battery pack
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Bridge type humidity indicator for seedling raising shed
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Light-sensing control switch
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Electronic-type touch switch
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Sweeping ultrasonic mosquito dispeller
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