Hauv cov kav dej lossis cov kav dej thiab cov khoom siv hluav taws xob sab hauv uas muaj qhov kub siab tshaj plaws ntawm kev khiav hauj lwm ntawm 90 ° C, thiab feem ntau nyob rau hauv cov cheeb tsam (xws li pej xeem thiab tsoomfwv cov tsev) uas muaj pa taws thiab cov pa phem tuaj yeem ua rau muaj kev hem thawj rau lub neej thiab khoom siv. Cov cables tsim tsis muaj corrosive gases thaum hlawv uas yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov khoom siv hluav taws xob.