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Two-dimensional-code-based system and method for sending product failure information
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Method and device for changing scanning lines in two-dimensional code scanning area into selected materials
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Two-dimension-code-based system and two-dimension-code-based method for transmitting dust discharge concentration information
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Label formed by two-dimensional code and variable information, generating method and generating system
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Document with tracing two-dimension code and processing method and tracing method thereof
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Label composed of two-dimension code and variable information, source tracing method and source tracing system
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Two-dimensional code with color gradient effect, generating method and generating system
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Custom two-dimensional code and generation method thereof, and directional pushing method and system of two-dimensional code
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Security and protection system based on code figure verification and method thereof
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Method for unloading APP application program via built-in unloading instruction
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Commodity data query and management system and method
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Business APP renewing method based on information sent by server and system
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Method for preventing two-dimensional code scanning area from scanning two-dimensional code by mistake
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Method and system for directional pushing of user-defined two-dimensional code
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Custom two-dimensional code, and generation method and directional pushing method and system thereof
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