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