The importance of product quality and accuracy to precision parts processing manufacturers is self -evident. Details that should be paid special attention should be paid in the production process. The small details determine the success or failure. Our good products. If the product cannot meet the accuracy requirements of the customer, the market will eliminate ruthlessly

     The specific concepts in the processing drawing of precision parts allows us to be more familiar with the size, deviation, and size tolerance, and keep in mind the level of generally unmotivated linearity and angle tolerance and generally unpopular shape and position tolerance.

     The elements of the size marking in the drawing are about the size, chamne, thread, light holes, sinking, threaded holes, grooves of sinking, threaded holes, and grooves of diameter size, diameter and semi -circular. With a further comprehensive understanding of the drawings, text and drawing instances allow us to learn more intuitive, and combine the work of work to make the quality of the product better.