Nyob rau hauv tus txheej txheem ntawm kev siv lub tshuab ntxaij luam ntawv, teeb meem ntawm number case scraping feem ntau tshwm sim, yog li peb tuaj yeem daws nws li cas?
1.
Xav seb cov xim muaj hlau ntau npaum li cas. Yog tias cov xim muaj hlau ntau dhau, pleev xim ntau dhau kom txog rau thaum qhov teeb meem zoo tas.
2.
Kev kho kom haum ntawm lub ntsuas phoo xovxwm tuaj yeem daws tau qhov teeb meem, lossis hloov riam riam los yog tshem tawm cov xim ntau dhau ntawm rab riam hniav.
3.
Kev tsim kho kev sib xyaw ntawm cov txiv ntoo uas tswj tau qhov nce thiab poob ntawm rab riam hniav yog txhawm rau kho qhov sib nrug ntawm cov hniav thiab cov hlau phaj kom zoo daws cov teeb meem.
4.
Kuj tseem muaj cov ntsia hlau uas kho qhov nce thiab poob ntawm rab riam lub thawv roj yob los daws qhov teeb meem.
5.
Kev puas tsuaj rau lub phaj steel kuj tseem tuaj yeem ua rau tus number case raug khawb. Kev daws yog los hloov qhov sib xws steel phaj (etched phaj).
