{TAIL ~ Each} of {HEAD ~ the master and slave subsystems} includes a servo actuated electric motor package, 29 and 30, respectively 
{ TAIL ~ Each } of { HEAD ~ the master and slave subsystems } includes a servo actuated electric motor package , 29 and 30 , respectively
TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH