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