invariant position

• 不变位

invariant position的用法和样例：

例句

1. Special welding auxiliary equipment is suitable for gyration work's welding dislocation, in order to gain perfect working position and welding speed.
   专用焊接辅助设备，适用于回转工作的焊接变位，以得到理想的加工位置和焊接速度。