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