1080 txhuas coils yog kev lag luam ntshiab txhuas, nrog cov yas siab, corrosion kuj, hluav taws xob conductivity thiab thermal conductivity, tab sis tsis tshua muaj zog, kev kho cua sov tsis tuaj yeem ntxiv dag zog txiav; vuam, atomic hydrogen vuam thiab tiv thaiv vuam, brazing; dais ntau yam kev ua haujlwm siab thiab txuas ntxiv, khoov.