Heerka American UL alwaax albaabada dabka rinji, qalabaysan qufulka dabka, dab-demiska gaarka ah, xidhitaannada albaabka dabka. Alaabta shirkadu waxa kale oo ay ka mid yihiin albaabada dabka birta ah, albaabada dabka birta ah, daaqadaha dabka, iwm. Ku soo dhawaada nala tasha.

ZHTdoors albaabbada dabka, 31 sano oo waayo-aragnimo wax soo saar ah oo albaabbada dabka iyo Daaqadaha. Albaabada dabka UL ee ugu muhiimsan, albaabada dabka EN, BS EN albaabbada dabka, iwm.