The slide element 8 also has at the rear end thereof {HEAD ~ an extension} 13 extending through the cut 6 into the recess 7 where {TAIL ~ the extension} 13 is enlarged to form a vertical end surface 14 
The slide element 8 also has at the rear end thereof { HEAD ~ an extension } 13 extending through the cut 6 into the recess 7 where { TAIL ~ the extension } 13 is enlarged to form a vertical end surface 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH