Vim nws qhov zoo ntawm nws cov khoom loj, daim ntawv thov ntau yam txuas ntxiv yog dav, los ntawm daim ntawv thov ntawm zawv zawg qhov rooj iav mus rau tom qab phab ntsa iav. Txij li cov duab ntawm lub log sib tsoo tuaj yeem hloov pauv, lub tsheb engraving daim iav kuj tuaj yeem hloov kho ntau yam sib txawv ntawm cov kab txaij.