Anayari, I do see the streaks and lines you're talking about. I don't know enough about film to tell you for certain what could have caused them, but if I had to guess I'd say that to me it looks like something inside the camera lightly scratched the film. Even though you have streaks or scratches on the film, they don't take much away from the pictures, IMO - the shots themselves are very good. And, some of the streaks can be diminished, significantly, if you do some PP in Photoshop. Really nice set of pics you have there.