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.

表中描关功能是表示：仪表针位于小刻度值时所具有关功能，即针从小刻度值始顺时针动时关状态，当针逆时针转动时，实现关功能相反。