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99.y: USB Head Phone Amplifier
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99.y: Line Trace Car Robot
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99.y: linetracecarrobot
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99.y: wireless communication
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99.y: half size micro mouse
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99.y: litium battery
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99.y: line trce car robot
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99.y: ＬＥＤ A
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99.y: ？？？
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99.y: Amp