In {HEAD ~ order} to displace {TAIL ~ the element} the actuator is impinged upon by a control voltage  
to displace
In { HEAD ~ order } to displace { TAIL ~ the element } the actuator is impinged upon by a control voltage
OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH