The attached drawings are for the purpose of expressing the content of the invention or utility model more intuitively, and a variety of drawing methods can be used to fully reflect the point of the invention. Such as schematic diagrams, block diagrams, directional views, partial cross-sections, flow charts, etc. For invention patent applications and all utility model patent applications with drawings in the description, the description of the drawings should be concentrated in the description. The specific requirements are: (1) The title of the drawing and the content of the illustration should be briefly described in accordance with the national standards for mechanical drawing; (2) If there is more than one drawing, all the drawings should be numbered in sequence and Make explanations; (3) Drawing descriptions need not include descriptions of the names and details of specific parts in the drawings.