SELECT *
FROM Linea l
WHERE NOT EXISTS (SELECT *
          FROM Parada p
          WHERE NOT EXISTS (SELECT *
                    FROM Abordaje a, Viaje v, Circuito c
                    WHERE a.Id_Viaje = v.Id_Viaje AND a.Cod_Parada = p.Cod_Parada AND a.Tipo_Abor ='Trasbordo' AND
                                           l.Nro_Linea = v.Linea AND a.Cod_Parada = c.Cod_Parada AND c.Nro_Linea = l.Nro_Linea
                                    )
           );