{HEAD ~ The present invention} relates to a method and {TAIL ~ devices} for identifying which cylinder is in the compression phase 
relates to
{ HEAD ~ The present invention } relates to a method and { TAIL ~ devices } for identifying which cylinder is in the compression phase
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH