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                            QRCode
百度百科： 
QR Code碼，是由Denso公司于1994年9月研制的一種矩陣二維碼符號，它具有一維條碼及其它二維條碼所具有的信息容量大、可靠性高、可表示漢字及圖象多種文字信息、保密防偽性強等優點。

wiki： 
QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to efficiently store data; extensions may also be used

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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