{HEAD ~ Numerous configurations} are within the scope of the present invention, including {TAIL ~ elongate chambers}, some of which can be formed of a long, relatively narrow pipe 
including
{ HEAD ~ Numerous configurations } are within the scope of the present invention , including { TAIL ~ elongate chambers } , some of which can be formed of a long , relatively narrow pipe
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH