Objective To investigate the effect of U-shaped soft pillow on the gynecological patients after abdominal operation.

Counter some hard nuts such as the flowing dapples and bedding on the product surface existing in the molding of the plastics parts, the optimum design of the runner of the injection mold for PVC-U pipe fittings is carried out.

Spring-back is a phenomenon that is ordinary but difficult to solve in sheet metal stamping formation,which is much more evident to the U-shape part,especially to the high strength U-part sheet metal stamping formation.