
Yuav ua li cas xaiv chav kuaj iav?
Rau kev yuav khoom iav, cov hauv qab no tuaj yeem suav hais tias yog: Cov khoom siv iav, lub ntsiab tam sim no yog GG-17, uas yog borosilicate 3.3. Qhov no kuj ruaj khov. Cov khoom siv nruab nrab siv yav dhau los tsis zoo li qub. Cov phab ntsa thickness ntawm cov iav ntsuas muaj feem xyuam rau lub neej kev pab cuam. Qhov loj