Cov khoom lag luam
Tshem tawm cov khoom siv tau siv cov khoom siv rov ua dua tshiab, thiab cov ntaub ntawv seem ntawm ob zaug tsis tau siv dua, uas tuaj yeem tiv thaiv cov yeeb nkab tub yees txias.
Cov Khoom Siv
Cim npe nrov: Pvc yeeb npog npog duct, Tuam Tshoj PVC yeeb nkab npog ducting ducting duct cov tuam tsev, lwm tus neeg, Hoobkas