{HEAD ~ The dual member probe} has {TAIL ~ an ultra smooth interior surface}, substantially free of eddy forming imperfections 
has
{ HEAD ~ The dual member probe } has { TAIL ~ an ultra smooth interior surface } , substantially free of eddy forming imperfections
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH