... date , name brand,etc, on pillar, frameworks, base plate,engine and other big workpieces.marking on flat surface , esay to ... manufacture date, nameplate, brand, etc.), framework, base plate, pillar , engine of the car,and other big and heavy materialMajor Parts ... manufacture date,name,brand,etc on body,framework,base plate,pillar,engine,and other big ,heavy materials.Major partsMain machine, ...