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: Ac Yeeb Nkab, Tuam Tshoj Ac Yeeb Nkab Cov Khoom Lag Luam, Chaw muag khoom, Hoobkas