Ntau tshaj 5 xyoo cov neeg ua haujlwm technical 30+ Ntau tshaj 10 xyoo ntawm cov neeg ua haujlwm 10+
Tus kheej tsim tshuaj ntsuam txhaj moldsolution Thawj lub tshuab nqus tsev vacuumsealing pawg ntau lawm kab
21 invention patents 29 utilitymodel patents