11. Engraving laser hwj chim nyob rau hauv ib tug cia li poob?

Yog vim li cas 1: Lub sijhawm ua haujlwm ntev, dej kub hauv lub tank siab dhau.

Kev daws: Hloov cov dej txias.

Yog vim li cas 2: Reflective lens unwashed los yog rupture.

Kev daws: ntxuav thiab hloov.

Yog vim li cas 3: Focus Lens tsis ntxuav los yog tawg.

Kev daws: ntxuav thiab hloov.