Ferrule kev ua si

Tsev 12 Rau sab kawg 2/2

Raws li ib qho ntawm cov ua si ferrule qho khoom ua si thiab cov neeg muag khoom hauv Suav, peb sov siab txais tos koj rau cov khoom pheej yig tshaj rau peb rau cov khoom siv pheej yig ntau.