Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 9311-1988 |
Adding machines and calculating machines--Keytop and printed or displayed symbols 加法器和计算器 键顶、打印或显示符号 |
China National Standards Adding machines calculating |
![]() English PDF |
GB/T 9310-1988 |
Adding machines and calculating machines--Numeric section of ten-key keyboards 加法器和计算器 十键键盘的数字区 |
China National Standards Adding machines calculating |
![]() English PDF |
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