{TAIL ~ The apparatus} may be advantageously mounted on {HEAD ~ a trailer}, for towing from site to site 
{ TAIL ~ The apparatus } may be advantageously mounted on { HEAD ~ a trailer } , for towing from site to site
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH