Khoom qaub sodium silicate khoom siv rau hauv ntau lawm

Cov khoom siv hluav taws xob sodium silicate cov khoom siv ntau lawm nrog cov khoom siv nyob rau hauv tsev (tuaj yeem ua rau cov khoom siv ntau lawm (tuaj yeem tsim cov khoom siv sodium 1.6-2.5) {{{. Cov zis tuaj yeem tsim raws cov neeg xav tau {}}