{HEAD ~ a blade hammer} on {TAIL ~ a root portion} of said blade engageable with a blade support to position said blade in the run condition, and 
on
{ HEAD ~ a blade hammer } on { TAIL ~ a root portion } of said blade engageable with a blade support to position said blade in the run condition , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH