1, Double column 2, Gas-cooling without pollution 3, ISO9001:2008 4, higher efficiency cnc mental metal grooverCNC keyway planer is ... steel V groover, metal groover lathe, which is mainly used for making groover in steel sheet. Then it is convenient ... , household electric appliance and so on. It is better effect for welded-steel plate construction, annealing treatment and stability. Working accuracy ...