[电] multiple-keyboard poing-of-sale system

duō jiàn pán fàn mài diǎn xì tǒng ㄉㄨㄛ ㄐㄧㄢˋ ㄆㄢˊ ㄈㄢˋ ㄇㄞˋ ㄉㄧㄢˇ ㄒㄧˋ ㄊㄨㄥˇ