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.

表中描述的开是表示：仪表指针位于最刻度值时所具有的开，指针从最刻度值开始顺时针动时的开状态，当指针逆时针转动时，实现的开相反。

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.

表中描述的开晴示：仪表指针位于最刻度值时所具有的开，指针从最刻度值开始顺时针转动时的开状态，当指针逆时针转动时，实现的开相反。