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