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