说明：  将基本应用的POS打印方式打包并提供函数调用,在windows环境下使用epson及brother系列的热敏或者针式POS打印机调用该库可减少相当大的工作量
(Basic application of POS to print packing manner and to provide function call, in windows environment using epson and brother series of thermal POS printer stylus or call the library to reduce the workload of a large)