Turn on and cut function details: The table shows the turn on and cut situations as pointer moves deasil, and the function is opposite while the pointer moves widdershins.

中描述的开关功能是示：仪指针位于小刻度值所有的开关功能，即指针从小刻度值开始顺针动的开关状态，当指针逆针转动，实现的开关功能相反。