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