巧用旧活塞环活塞环一般采用耐热、耐磨的优质灰铸铁或合金铸铁制成。废旧的活塞环往往被人们当废品扔掉。其实用它当做电焊条。对磨损的摇臂头、离合器分离杠杆工作表面，进行点焊后再磨修，其耐磨性大大增强，效果很好。也可用它当做焊丝，采用气焊的方法，对损坏的变速... Clever use of the old piston ring piston rings are generally made of heat-resistant, wear-resistant high-quality gray cast iron or alloy cast iron. Waste piston rings are often thrown away by people as scrap. In fact, it used as a welding rod. On the wear of the rocker arm, clutch lever surface separation, and then grinding after spot welding, its wear resistance greatly enhanced, the effect is very good. It can also be used as a wire, the method of gas welding, damage to the variable speed ...