The actuator has {HEAD ~ 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 
of
The actuator has { HEAD ~ 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
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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