Articulated chassis 14 is supported for over {HEAD ~ the ground travel} by {TAIL ~ a pair} of front wheels 22 mounted to front frame section 16, and a pair of rear wheels 24 mounted to rear frame section 18 
Articulated chassis 14 is supported for over { HEAD ~ the ground travel } by { TAIL ~ a pair } of front wheels 22 mounted to front frame section 16 , and a pair of rear wheels 24 mounted to rear frame section 18
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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