{HEAD ~ The simulator} is provided with {TAIL ~ a drop tube} or tower in which the projectile is positioned 
is provided with
{ HEAD ~ The simulator } is provided with { TAIL ~ a drop tube } or tower in which the projectile is positioned
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH