{HEAD ~ The present invention} further provides {TAIL ~ a controller} which monitors the movement of each hydraulic actuator, and temporarily interrupts the operation of the leading actuator to ensure that both actuators move in unison 
provides
{ HEAD ~ The present invention } further provides { TAIL ~ a controller } which monitors the movement of each hydraulic actuator , and temporarily interrupts the operation of the leading actuator to ensure that both actuators move in unison
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH 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