Das Wr-322Sfx ???c Thi?t K? ?? S? D?ng Ngo�i Tr?i, Nh? V�o C�ng Ngh? Fx V? Th�ng Ko B? C�c Y?u T? T? Nhi�n L�m H? H?i, Th�ch H?p ?? S? D?ng Cho C�c S? Ki?n Ngo�i Tr?i