Cov khoom lag luam
Tooj liab yeeb
Lawv txhua tus tau ua los ntawm cov curify cather cather (99.99%), zoo ib feem. Muaj cov pa oxygen tsawg, ruaj khov zoo thiab ris siab siab.
Cim npe nrov: cua txias kav, tshuab cua txias cov tshuab hluav taws xob, cov chaw muag khoom, Hoobkas