{HEAD ~ A small cannister} 72 is mounted at {TAIL ~ the back edge} of louver 62, and a large cannister 74 is mounted at the front edge 
is mounted at
{ HEAD ~ A small cannister } 72 is mounted at { TAIL ~ the back edge } of louver 62 , and a large cannister 74 is mounted at the front edge
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH