Cov yeeb nkab hlau yog dov thiab tsim rau hauv tubular lossis U-, J- lossis C-puab thiab haum rau ntau yam kev lag luam. Txhua yam khoom siv hlau yog cov hlau zoo tagnrho thiab tuaj yeem xaiv raws li kev siv sib txawv. Cov hlau muaj xws li hlau, txhuas, zinc, thiab tooj liab. Aluminium feem ntau yog siv vim nws hloov tau, hloov tau, xeb-pov thawj, thiab corrosion-resistant.
Hauv kev tsim kho kev lag luam, cov hlau channel tuaj yeem ua haujlwm raws li cov phab ntsa faib thiab ua raws li lub suab absorbers. Thaum cov phab ntsa cuam tshuam los ntawm lub suab nrov ntawm ob sab ntawm phab ntsa, cov kev vibrations tsim los ntawm phab ntsa thaum lub sij hawm ntsiag to muaj qee yam inhibitory nyhuv ntawm phab ntsa. Qhov no tsuas yog ib daim ntawv thov ntawm cov yeeb nkab hlau uas muaj zog heev thiab ruaj khov.
