Cov roj hydrogenated hydrocarbon tau dhau los ua ib qho tseem ceeb ntawm ntau yam kev lag luam vim lawv cov khoom tshwj xeeb thiab kev hloov pauv tau yooj yim. Tsim los ntawm cov khoom noj hydrocarbon uas tau hydrogenated, cov roj synthetic no yog cov khoom ruaj khov, ua haujlwm tau zoo ...