Tus qauv code rau cov thawv txias yog RF.
Cov cai no tau siv dav hauv kev lag luam freight kom paub qhov txawv thiab txheeb xyuas cov thawv tshwj xeeb uas siv los thauj cov khoom uas xav tau tub yees lossis khov. Daim ntawv thov ntawm RF code ua kom ntseeg tau tias cov khoom tuaj yeem tswj tau qhov kub thiab txias thaum lub sijhawm thauj mus los, yog li ua kom cov khoom zoo thiab kev nyab xeeb ntawm cov khoom.
