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