As described above, {TAIL ~ the cover} 43 is provided over the entire circumferential end edge with a base attachment piece 432 U shaped in {HEAD ~ cross section} 
As described above , { TAIL ~ the cover } 43 is provided over the entire circumferential end edge with a base attachment piece 432 U shaped in { HEAD ~ cross section }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD