The power shaft extends through and is supported by a counter rotation transmission unit which drives {HEAD ~ an inner blade row} in {TAIL ~ counter rotational motion} to the outer blade row 
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The power shaft extends through and is supported by a counter rotation transmission unit which drives { HEAD ~ an inner blade row } in { TAIL ~ counter rotational motion } to the outer blade row
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH