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