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Camera and tv monitor system for eliminating dead angle of automobile and reducing accidents resulting in injury or deaths, and damages
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Connection check system in distribution wiring
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Easy checking system for connection in distribution construction
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Drip plate such as pipe hood and ventilating opening
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Universal drip plate for pipe hood and ventilation port or the like
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Manual operation device for continuously dropping group of heavyweight sphere stacked in vertical cylinder
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Vertical lifter of heavy ball by using bar magnet
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