Txhawm rau pub los ntawm lub zog, teeb liab, thiab cov ntaub ntawv yog qhov xav tau ntawm hluav taws xob engineering thiab vaj huam sib luag lub tsev. Cov ntaub ntawv insulating, cov kab txuas txuas thiab tsim qauv ntawm lub davhlau ya nyob twg yog cov qauv sib txawv. Kev pub-dhau los ntawm lub davhlau ya nyob twg yog qhov tsim nyog rau kev koom nrog thiab / lossis txuas ib lossis ntau tus neeg saib xyuas. Lawv tuaj yeem muaj ib lossis ntau qib kev sib txuas uas nyob ntawm tib lub peev xwm lossis insulated rau ib leeg.