{HEAD ~ The other end} of {TAIL ~ the arch block} is supported on a spring in a blind hole in the arched notch 
of
{ HEAD ~ The other end } of { TAIL ~ the arch block } is supported on a spring in a blind hole in the arched notch
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