Around the notch 43 is {HEAD ~ a plurality} of {TAIL ~ pivotally disposed main ribs} 45 for supporting the cover 41 
of
Around the notch 43 is { HEAD ~ a plurality } of { TAIL ~ pivotally disposed main ribs } 45 for supporting the cover 41
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH