Txhawm rau ua kom lub neej ua haujlwm siab tshaj plaws ntawm aluminium foil ducts, cov lus qhia hauv qab no tsim nyog xav txog:
1. Ua ntej cov khoom muaj npe nrov nrog cov khoom zoo thaum yuav khoom, thiab tsis txhob siv cov khoom tsis zoo.
2. Xaiv cov yeeb nkab uas tsim nyog raws li qhov chaw teeb tsa kom txo tau qhov cuam tshuam ntawm ib puag ncig ntawm cov ducts.
3. Ua haujlwm tu thiab tu tsis tu ncua kom cov ducts huv si thiab tsis muaj kev cuam tshuam, thiab tam sim ntawd txheeb xyuas thiab daws txhua yam teeb meem.
