... -casting motorcycle engine water inlet cover .3.Color:silver white,offwhite,black,etc.4.Processing:die casting ... ,quenching,carburizing and quenching,annealing.6.Follow-up processing: 1)Ordinary processing: cutting, deburring, sand blasting, polishing, grinding ... , testing equipment, perfect quality assurance system, advanced processing equipment. 3)The company stresses credibility, heavy contract ...