中文说明：包括对轴的各种操作，可以拿来用在自己程序中。 普遍适用于仿真和作图的操作。-Including a variety of operating shaft can be brought to use in their own programs. Generally applied to simulation and mapping operations.
English Description：
Including a variety of operating shaft can be brought to use in their own programs. Generally applied to simulation and mapping operations.