Cov qauv tsim precision, niaj hnub mesh, nrog zoo corrosion kuj thiab muaj zog thiab ruaj thiab lwm yam.Siv dav hauv kev lag luam thiab kev tsim kho kev lag luam, tshuaj xyuas cov xuab zeb, lim, lim kua thiab roj.Kuj tseem siv tau rau cov khoom siv kho tshuab xws li kev tiv thaiv kev ruaj ntseg.