(1） Primo procedus lapidium metallorum nomeplaterum reliquus est super fortes exteriores quae per pressiones et moldas ad plateas, stripas, pipes, et profiles faciunt deformationem plasticam aut separationem ut possiderent formam et granditudinem opus

(2） Stamping and forging both belong to plastic processing (or pressure processing), collectively known as forging. Stamping blanks are mainly hot-rolled and cold-rolled steel plates and strips. 60% to 70% of the world's steel is sheet metal, most of which is stamped into finished products.

(3） The body, chassis, fuel tank, radiator, boiler drum, container shell, iron core silicon steel sheets of motors and electrical appliances of automobiles are all processed by stamping. There are also a large number of stamped parts in products such as instruments, household appliances, bicycles, office machinery, and household utensils.