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