In certain situations, when bolts and screws must still be used, efforts should be made to reduce the time for tightening and removing the screws. The goal of improvement is to be able to achieve the function of locking without removing bolts and screws. The main method can be tightened or relaxed by rotating only once, and the purpose of tightening can be achieved by only one rotation.

The switching action of the plastic vowin.cn/en/News/news1251.html' target='_blank'>vowin.cn/' target='_blank'>molding must be replaced with different molds or working conditions due to different products, and adjustment must be made. We believe that standardization can greatly increase the efficiency of mold replacement.