A supplementary set of keys, usually numerical and arranged like a calculator, added to a keyboard.
A supplementary set of keys, usually numerical and arranged like a calculator, added to a keyboard.
一组增设的键盘，通常是数字型的，其排列方式与计算器的排列方式相似，附设在主键盘上。
A supplementary set of keys, usually numerical and arranged like a calculator, added to a keyboard.
一组增设的键盘，通常是数字型的，其排列方式与计算器的排列方式相似，附设在主键盘上。