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