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