3. Vim li cas engraved nto hlawv tshwm sim?

Yog vim li cas 1: Qhov kev daws teeb meem siab dhau los yog kab sib nrug me dhau.

Kev daws: Rov pib dua qhov kev daws teeb meem

Yog vim li cas 2: Laser hwj chim siab dhau lawm

Kev daws: Txo nws.

Yog vim li cas 3: Blower, tso pa tawm tsis qhib.

Kev daws: Tig lawv rau