For example, as shown in FIG 7, {HEAD ~ two such actuators} 300 may be crossed to provide {TAIL ~ torsional actuation} 
crossed to provide
For example , as shown in FIG 7 , { HEAD ~ two such actuators } 300 may be crossed to provide { TAIL ~ torsional actuation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL