{TAIL ~ Apparatus} 8 wherein said locking means comprises a centrifugal lock operable above a given angular velocity of said sections to effect {HEAD ~ said locking action} 
{ TAIL ~ Apparatus } 8 wherein said locking means comprises a centrifugal lock operable above a given angular velocity of said sections to effect { HEAD ~ said locking action }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD