说明：  数控车床编程代码说明其中包括准备功能也称为G功能定位指令命令刀具以点位控制方式从 刀具所在点快速移动到目标位置
(CNC lathe programming code instructions including preparation function is also known as G function tool positioning instruction command to control a fast-moving point the point where the tool to the target position)