Surface defects casting in Richard: but sometimes we don't have a lot of defects, need not invest more of the cost, we use some repairing adhesive can repair good, convenient and simple, for example iron materials, we can use (strength element into) JS902 repair under a, burn could be placed in later, so that can do for our factory cost saving ah, let our casting factory to put more money into improving the quality of the product itself, let users to create more wealth rich.