... be steel, brass, stainless steel, plastic, Aluminium4Usage: car accessory,components for furniture, industry,machine auto, machiningsheet metal part 4Partner:Chang he car company5 ... , 6engineering technicians, including 3senior professor engineersOUR STAMPING(1) Material: stainlesssheet metal part steel, iron ( SPCC, SECC, SPTE, tinplate), aluminum alloy, brass, bronze ...