Silicone roj hmab, elastomer, adhesive, PVC, xim txheej, luam ntawv number cask, tshuaj, pleev xim rau lwm tus
Fumed silica yog superfine micro-nano nplua tshuaj lom neeg, uas tau sib txawv thiab yog li thaum muaj kev pab ua ntej, yog li ntawd tuaj yeem qhia qhov tseeb hom
