Tom qab cov hlau phaj tau dhau los ua ntau yam txheej txheem xws li laser txiav, khoov ua, tshuaj tiv thaiv xeb, thiab qauv luam ntawv, qhov zoo-zoo thiab ruaj khov. S&A chiller sheet hlau tau tsim. Qhov zoo S&A dej chiller kuj tseem nrov nrog cov neeg siv khoom vim nws qhov zoo nkauj thiab ruaj khov daim ntawv hlau casing.