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1·The num Lock key and virtual numeric keyboard are gone.

数码锁定键和虚拟数字键盘都没有了。

2·Digital calculator experimental system is a cashier numeric keyboard training system developed for business vocational school.

数字计算器实验系统是面向商业类职校学生收银操练的实验系统。

3·A folding keyboard is set forth with a numeric keypad, and one fold line located between the edge of a standard continuous space bar and the edge of the numeric keypad.

提出了一种折叠键盘，其限定有数字键区，并且一个折叠线位于标准连续空格键的边缘和数字键区的边缘之间。