iav tov rau cov khoom siv hauv tsev
Muab piv rau iav tuab (3mm lossis 4mm tempered iav)
Ntau yam ntawm cov duab (puab, duab plaub, square, tsis xwm yeem thiab lwm yam)
Yuav tsum tau tsim tshwj xeeb
Tso cov nyhuv zais
Shinning thiab siab reflection nto