1)Numeric keyboards,数字键盘2)full digital keypad,全数字键盘3)partial digital keypad,半数字键盘4)numerical keyboard device,数字键盘装置5)Hanzi input for numeric keypad,数字键盘的汉字输入6)standardized letter digital keyboard,标准字母数字键盘
用法例句
An economical elevator group control model with partial digital keypads is proposed.