Stampingyog qhov ua tau zoo thiab siv cov pwm sib xyaw.Qhov txawv txav yog ntau lub chaw nres tsheb nce qib tuag, uas tuaj yeem ua ntau yam haujlwm stamping ntawm ib lub xovxwm kom ua tiav cov khoom siv tsis siv neeg.Kev tsim khoom nrawm nrawm, lub sijhawm so ntev, tus nqi qis, thiab cov khoom tuaj yeem tsim tau ntau pua daim ib feeb, uas yog hlub los ntawm ntau lub chaw ua haujlwm.