Tham txog cov mob uas cov ntaub ntawv yuav ignite thiab cov kev tiv thaiv kev ntsuas kom tsis txhob muaj kev huam yuaj ignition.
Tham txog cov mob uas cov ntaub ntawv yuav ignite thiab cov kev tiv thaiv kev ntsuas kom tsis txhob muaj kev huam yuaj ignition.