Stamping tuag
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Stamping Tuag
Stamping tuag yog ib hom cuab yeej siv cov txheej txheem tshwj xeeb uas ua cov khoom siv (hlau lossis nonmetal) rau hauv qhov chaw (lossis ib nrab cov khoom tiav) hauv cov txheej txheem txias stamping, uas hu ua txias stamping tuag (feem ntau hu ua txias stamping tuag). Stamping yog ib hom kev ua haujlwm siab, uas siv tus
