As shown in FIG 3, for instance, the depth of the groovelike indentations 17 is greater than that of the insertion slit 9, and their width is likewise substantially greater than {HEAD ~ the width} of {TAIL ~ the insertion slit} 9  
As shown in FIG 3 , for instance , the depth of the groovelike indentations 17 is greater than that of the insertion slit 9 , and their width is likewise substantially greater than { HEAD ~ the width } of { TAIL ~ the insertion slit } 9
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH