Galvanized Barrier,Security Fence,Airport Fence Anping Tianshun Metal Net Co., Ltd. , http://www.chawiremesh.com The upper and lower profile machining refers to a machining method in which the shape of the XY program plane and the UV auxiliary plane of the workpiece are inconsistent. For example, the pattern of the XY program plane is a circular shape, and the pattern of the UV auxiliary plane is a rectangular processing method. This processing method is particularly useful for the processing of mold drafts.