{HEAD ~ One louver} 62 has {TAIL ~ a solar tracking system} mounted to it constructed according to the principles of the present invention 
{ HEAD ~ One louver } 62 has { TAIL ~ a solar tracking system } mounted to it constructed according to the principles of the present invention
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH