Зэвэрдэггүй Ган Энгийн / Хавтгай Угаагч Din125 Oem Экспортлогч
Spring washers are used to prevent loosening, flat washers have no relaxation function, that is, flat washers only increase the contact area, and spring washers can prevent loosening. Flat pads: just increase the surface area to prevent damage to the mounted parts of the soft substrate or to bloc...