IEC 61020-2-2-1994
电子设备用机电开关 第2部分:旋转开关的分规范 第2节:中央悬挂、12位、17mm直径的旋转开关详细规范
Electromechanical switches for use in electronic equipment - Part 2: Sectional specification for rotary switches - Section 2: Detail specification for rotary switches with central mounting, 12 positions, 17 mm diameter