Organic kev sib txhuam cov khoom muab lub neej ntev ntev hauv cov dej num hnyav thiab ntau yam kev siv nres.
Cov khoom lag luam nres tsheb no yog cov khoom siv hlau uas tsis muaj asbestos nrog cov hlau fiber ntau thiab cov khoom siv fiber ntau ua cov fibers tseem ceeb.
Peb cov khoom muaj cov yam ntxwv ntawm lub zog siab, kev ua haujlwm ntev, kev ua haujlwm zoo braking thiab kub tsis kam.
Nws yog ib tus neeg sawv cev ntawm cov qauv hlau tsis tshua muaj tam sim no thiab tsim nyog rau cov tsheb siv hauv ntau yam khoom siv.
