profit
Kev nqus suab nrov thiab txo suab nrov, lub suab rwb thaiv tsev paj rwb siv cov khoom siv fiber ntau ntxeem tau, uas tuaj yeem nqus cov suab nrov ncaj qha thaum cov yeeb nkab ntws tawm, kom ua tiav cov suab nrov txo.
cons
Ua phem rau kev noj qab haus huv, suab rwb thaiv tsev paj rwb yog tsim los ntawm asbestos, thiab asbestos fibers zoo heev. Thaum nws khiav tawm ntawm lub raj xa dej, cov asbestos fibers yuav raug ncaj qha rau saum huab cua.