The combination 7 wherein said rotating means comprises a circular member fixed to the tower bottom and {HEAD ~ rotary drive means} for engaging {TAIL ~ the circular member} 
for engaging
The combination 7 wherein said rotating means comprises a circular member fixed to the tower bottom and { HEAD ~ rotary drive means } for engaging { TAIL ~ the circular member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL