The floor panel 18, wherein {HEAD ~ said locking surface} of the recess is located in {TAIL ~ the portion} of said lower lip at an area that is disposed distally beyond said upper lip 
is located in
The floor panel 18 , wherein { HEAD ~ said locking surface } of the recess is located in { TAIL ~ the portion } of said lower lip at an area that is disposed distally beyond said upper lip
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH