Led by the quality department of Weibang, and cooperated with the production department and the equipment department, it is planned to carry out the reverse air tightness test by adding the reverse air tightness equipment to improve the problems in the oil seal turning process. At present, the equipment is under debugging and installation. At the same time, it promotes the suppliers to improve the quality of incoming materials, so as to reduce and reduce the quality problems of oil seals, and provide a good quality support for comprehensively improving the quality of Yubang products and shaping the brand image.