Nrog rau daim ntawv thov ntawm stamping qhov chaw ua ntau dua, tib neeg tsis paub koj cov kev nkag siab yooj yim ntawm stamping ntu {}}
Cov txheej txheem stamping tuaj yeem raug muab faib ua ob pawg: Cais txheej txheem thiab ua ke cov txheej txheem (tseem muab faib ua ke, kos duab) .
Qhov txheej txheem sib cais yog cais cov stamping ib feem ntawm ib tug kab kev sib cais thaum lub sijhawm sib cais ntawm cov thwj cim yuav tsum tau ua raws qee yam kev cai;
Cov txheej txheem tsim yog ua kom cov stamping blastically deform nyob rau hauv lub zwj ceeb ntawm tsis tawg, thiab kuj tau raws li cov kev xav tau ntawm kev ua siab ntev {}}
Muaj ob txoj hauv kev ntawm cov stamping txias thiab kub stamping raws li qhov kub thiab siv cov khoom siv hluav taws xob, thiab kev siv lub tshav kub kub los ntawm cov khoom yuav tsum tau txiav txim siab.
