Triangle renovation zui good don't do such a thing, because the old triangle is not only the problem of wear and tear, triangle, and stress fatigue ageing problems. After renovation can solve the problem of surface wear, only commonly stress aging but not solve the problem, there are a lot of accidents. If just want to make the belt is bright, can try to use the tire light reducing agent, to wash the car or vehicle supplies store, you can also access to the Internet search, the reducing agent varieties more, choose a zui affordable! ! ! ! Questions about fast measuring length, can make a cone and frustum of a cone, cone on different heights carved scale, scale is the level the circumference of the circle, the different levels of triangle set into the cone, at which scale can no longer fall, is the length of the triangle is the scale of the readings. This article by polyurethane industrial synchronous belt arc-gear synchronous belt original, reproduced please indicate the copyright: http://www. lilainuo。 com