Peb lub tuam txhab tuaj yeem muab geosynthetics installation tom qab-muag kev pab cuam rau tag nrho cov installation tej yaam num peb tau cog lus rau peb cov neeg.Thiab raws li qhov xwm txheej sib txawv, peb yuav txiav txim siab them nqi lossis tsis them.
Cov duab hauv qab no qhia peb cov kws tshaj lij kev teeb tsa tau txais txiaj ntsig banners los ntawm peb cov neeg siv khoom:
