{HEAD ~ The first reaction chamber} is arranged in {TAIL ~ continuous fluid communication} with the downstream conduit and has a preselected first effective surface area 
is arranged in
{ HEAD ~ The first reaction chamber } is arranged in { TAIL ~ continuous fluid communication } with the downstream conduit and has a preselected first effective surface area
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH