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