说明： 用与计算机的串口通信， MAX232转4 (Bunches of communication that used with the computer , MAX232 change into 4)
文件列表：
232 to 422
..........\232 TO 422.Bkp
..........\232 TO 422.Ddb
..........\Backup of RS232to422.PCB
..........\pcb加工
..........\.......\TEIPAN.PCB
..........\Previous Backup of RS232to422.PCB
