{HEAD ~ Another object} of {TAIL ~ the invention} is to provide such an engine having a working piston with a relatively long stroke 
of
{ HEAD ~ Another object } of { TAIL ~ the invention } is to provide such an engine having a working piston with a relatively long stroke
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH