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