1)administer standard: GB,DIN,ISO,JIS,etc. 2.)delivery in time 3.) ... ,gr2,gr5,gr7,gr9,gr11,etc.2.)size:M3-M603.)standard:GB,DIN,UNC,JIS,BS,ISO4.)features:low density,corrosion ... field, Aeros pace or Military, Petroleum chemical industry, Car, Bicycle, Motor vehicle manufacturing, Machine parts, High corrosive environment, etc.Processing method: casting ...