Khoom siv
Cov cuab yeej siv tsuas yog siv hauv kev txuag hluav taws xob boiler thiab kev tiv thaiv ib puag ncig, kev txhim kho tsheb fais fab, khib nyiab incineration, steel txiav thiab vuam, kev kho mob sealing, hydrogen tsheb thiab lwm yam kev lag luam.
