Cov rivets tseem ceeb, nws tus kheej yog ib hom kev siv rivet dav dua yog kev hloov pauv ntawm cov ntsia hlau, cov ntsia hlau muaj zog dua li kev ruaj khov dav dav, qhov zoo kuj muaj kev lees paub, hauv peb lub neej txhua hnub ib ntus, peb tuaj yeem pom tias feem ntau siv cov khoom siv hluav taws xob tsim nyog yuav rub rivet rau hauv cov hlau lossis cov ntoo, yog li siv cov lus tuaj yeem zoo li yooj yim heev, kuj tuaj yeem ua lub luag haujlwm ruaj khov mus sij hawm ntev.
Lub sijhawm tshaj tawm: Lub Ob Hlis-23-2021