a multiplicity of bladed interrupter elements disposed longitudinally relative to one another in {HEAD ~ the direction} of {TAIL ~ flow} of the fluid, 
of
a multiplicity of bladed interrupter elements disposed longitudinally relative to one another in { HEAD ~ the direction } of { TAIL ~ flow } of the fluid ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH