said {HEAD ~ outer ring} comprises {TAIL ~ front fingers} extending upstream at said upstream end of said outer ring and cooperating with said first shaft to prevent rotation of said outer ring relative to said first shaft, a conical surface at said downstream end of said outer ring converging in the downstream direction at an angle of about 40 degrees relative to the axis of said turbo engine, and rear fingers extending downstream at the inner edge of said downstream conical surface of said outer ring, 
comprises
said { HEAD ~ outer ring } comprises { TAIL ~ front fingers } extending upstream at said upstream end of said outer ring and cooperating with said first shaft to prevent rotation of said outer ring relative to said first shaft , a conical surface at said downstream end of said outer ring converging in the downstream direction at an angle of about 40 degrees relative to the axis of said turbo engine , and rear fingers extending downstream at the inner edge of said downstream conical surface of said outer ring ,
OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH