Qoj Khoom Tsav Tsav Magnet

Raws li ib qho ntawm cov cuab yeej ua kom muaj zog muaj zog muaj zog magnetic thiab cov chaw muag khoom hauv Suav teb, peb tau nthuav tawm los ntawm cov khoom lag luam zoo thiab tus nqi qis. Thov so assured mus yuav cov khoom siv qoj ib ce muaj zog magnet ua nyob rau hauv Suav teb no los ntawm peb lub hoobkas.