• 1. alternation switch: 转换开关 | 变更开关 | 交替开关 | 转换开闭
• 2. analysis of switch state alternation: 开关状态互换分析

• 1.The alternation interface of intelligent instruments composed of lattice LCD and photoelectric coding switch makes its operation towards menu form and fully automatic.
  由点阵式液晶显示器和旋转式光电编码开关构成的智能仪器的人机交互界面，使仪器的操作向菜单式、傻瓜型迈进。
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