  Intrinsic flow in plasma physics is a long-standing puzzle, since it is
difficult to understand its origin without contradiction to momentum
conservation in conventional wisdom. It is proved that the electromagnetic
turbulent acceleration as a candidate for intrinsic parallel flow generation
driven by pressure gradient along the total magnetic field line does not
contradict momentum conservation. The conserved quantity corresponding to axial
symmetry is the total gyrocenter parallel canonical momentum carried by both
species or the total gyrocenter parallel momentum including the ion gyrocenter
kinematic momentum and electromagnetic fields momentum, but not the ion
kinematic momentum, or even the ion parallel flow. A conservation equation of
total parallel momentum including the ion particles' kinematic momentum and
electromagnetic fields momentum is also presented.
