Velocity field vectors (arrows) indicating the expansion of the molecular envelope of V370 And, which is defined by an oblate spheroid whose equatorial plane is inclined by ∼25° with respect to the plane of the sky, attached to a biconical structure. A view from the direction defined by west in the plane of the sky is shown (the observer is on the left). The Y and Z axes are represented by green and blue, respectively. We note that the oblate spheroid (without arrows in order to avoid confusion) has a similar expansion to that of the previous examples. The biconical structure, defined by two cones, however, expands outwards from the central structure with constant velocity, indicating the presence of a bipolar outflow similar to that already found in EP Aqr (see above). The main symmetry axis of the molecular envelope (the same as the main axis of the cones), as well as the equatorial plane of the oblate spheroid, indicate a clear axial symmetry.