  I consider a flow structure by which main sequence companions that enter a
common envelope evolution (CEE) with giant stars might launch jets even when
the accreted gas has a sub-Keplerian specific angular momentum. I first show
that after a main sequence star enters the envelope of a giant star the
specific angular momentum of the accreted gas is sub-Keplerian but still
sufficiently large for the accreted gas to avoid two conical-like openings
along the two opposite polar directions. I suggest that the high-pressure zone
that the accreted gas builds around the main sequence equatorial plane
accelerates outflows along these polar opening. Most of the inflowing gas is
deflected to the polar outflows, i.e., two oppositely-directed jets. The actual
mass that the main sequence star accretes is only a small fraction, ~0.1, of
the inflowing gas. However, the gravitational energy that this gas releases
powers the inflow-outflow streaming of gas and adds energy to the common
envelope ejection. This flow structure might take place during a grazing
envelope evolution if it occurs, during the early CEE, and possibly in some
post-CEE cases. This study increases the parameter space for main sequence
stars to launch jets. Such jets might shape some morphological features in
planetary nebulae, add energy to mass removal in CEE, and power some
intermediate luminosity optical transients.
