Das Aero 20A.120 L� H? Th?ng Loa Line Array Nh? G?n L� ?� L� S? K?t H ?p Ho�n H?o Gi?a Alas V� Th�nh C�ng T? S?n Ph?m Aero 12A ???c Tung Ra Th? Tr??ng N?m 2009