When stretching the umbrella, the protruding button at the fastening device is steadily locked at the fastening orifice at {HEAD ~ the fixing portion} to smoothly stretch {TAIL ~ the umbrella} 
to smoothly stretch
When stretching the umbrella , the protruding button at the fastening device is steadily locked at the fastening orifice at { HEAD ~ the fixing portion } to smoothly stretch { TAIL ~ the umbrella }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL