Lub zeem muag ntawm kev ua liaj ua teb engineering tau tham txog ntawm Zolotaya Niva exhibition
Lub exhibition tshwm sim nyob rau hauv Ust-Labinsky koog tsev kawm ntawv ntawm lub Krasnodar cheeb tsam. Txog 400 lub tuam txhab tsim khoom los ntawm Russia koom nrog nws ...