{TAIL ~ An umbrella structure} includes a cover, a shaft, a notch, a runner, main ribs and {HEAD ~ stretchers} 
{ TAIL ~ An umbrella structure } includes a cover , a shaft , a notch , a runner , main ribs and { HEAD ~ stretchers }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD