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Terminal control method and system
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Instantaneous noise suppressing method for audio-frequency amplifier
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Dot matrix coding processing system
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Optical touch position identification device
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A kind of time writer
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Dot matrix code identification method and device
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A kind of active electromagnetic pen
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Substrate, code recognition method and device based on substrate
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Dot matrix encoded medium and dot matrix code identification method
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Substrate and data processing method based on dot matrix coding
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Substrate with coding pattern, code recognition method and device based on substrate
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A kind of information recording method and device
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A kind of frequency calibrating method and device
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Dot matrix encoding and decoding method
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Dot matrix coded base and dot matrix code identification method
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Verification information processing method and system
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Dot matrix encoding identification device
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Image processing method and device
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Image collecting device
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A kind of information transferring method and system
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