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