Niaj hnub no, lubcov yeeb nkab hlau tsis muaj seamless GB8163 20#Cov khoom uas cov neeg siv khoom Is Nrias teb yuav tuaj txog, thiab yuav raug pleev xim thiab txau tag kis. Thov tos ntsoov. Tus neeg siv khoom xav tau lub sijhawm xa khoom 15 hnub, thiab peb tau luv nws mus rau 10 hnub. Zoo siab rau cov engineers hauv ntau txoj haujlwm.