{HEAD ~ The slide element} has {TAIL ~ a tongue} upwardly extending from the front end thereof and provided with an inclined outer surface which abuts the front end of the cover member 
has
{ HEAD ~ The slide element } has { TAIL ~ a tongue } upwardly extending from the front end thereof and provided with an inclined outer surface which abuts the front end of the cover member
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH