The lock assembly selectively cooperates with {HEAD ~ the ground member} to secure {TAIL ~ the clamp body} and structure engaged therewith relative to the ground member 
to secure
The lock assembly selectively cooperates with { HEAD ~ the ground member } to secure { TAIL ~ the clamp body } and structure engaged therewith relative to the ground member
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH