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