The code 39 of bar code is used in automatic system of library at present. The article introduces the cod principle and character of the code 39,the design method of printing and brief programmed code of visual C++.是什么意思_The code 39 of bar code is used in automatic system of library at present. The article introduces the cod principle and character of the code 39,the design method of printing and brief programmed code of visual C++.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句