{HEAD ~ The actuator} has at least one pair of {TAIL ~ wings} which extend from the actuator body, wherein the entire lower edge of each wing curves continuously outwardly and upwardly from the body 
{ HEAD ~ The actuator } has at least one pair of { TAIL ~ wings } which extend from the actuator body , wherein the entire lower edge of each wing curves continuously outwardly and upwardly from the body
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH 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