High borosilicate iav, nws yog ib yam uas tsis tshua muaj nqi, siab kub resistant, siab zog, siab hardness, siab transmittance thiab High Chemical stability tshwj xeeb iav khoom, piv nrog cov iav, uas tsis yog-tshuaj lom tshwm sim, nws cov khoom, t. ..
Nyeem ntxiv