Thaum xaiv cov ntaub ntawv rau cov khoom siv stamping, tsis yog peb xav txog cov ntaub ntawv ua haujlwm, tab sis kuj yog peb yuav tsum tau ua raws li cov ntaub ntawv thov cov ntaub ntawv raws li hauv qab no.
{{0 {}} Muaj ib txoj kev ua tau zoo stamping ua haujlwm rau stamping seem
Rau cov txheej txheem tsim, xws li ncab, khoov, sib txawv, cov ntaub ntawv yuav tsum muaj qhov yooj yim ntawm kev kho cov qauv, muaj qee qhov kev hloov kho, muaj qee yam ntawm cov yas nyob rau hauv cov ntaub ntawv thov .
{{02. stamping feem muaj ntau dua nominal zoo
Lub npe ntawm daim ntawv yuav tsum yog du, tiaj, thiab dawb ntawm qhov tsis xws luag thaum lub puab tsaig . Lub nominal zoo ntawm cov ntu kuj yog qhov zoo.
3.} Cov tuab tuab kam rau cov ntaub ntawv stamping yuav tsum ua raws li cov qauv hauv tebchaws
Txij li thaum cov pwm sib txawv tsuas yog siv rau cov ntaub ntawv hauv cov ntaub ntawv tuab, nws kuj tseem muaj kev puas tsuaj rau cov khoom siv zigzag, yog tias cov ntawv sau ua kev puas tsuaj rau cov khoom siv tau zoo heev
