When stretching the umbrella, {HEAD ~ the protruding button} 51 at the fastening device 5 is steadily locked at the fastening orifice 432 at {TAIL ~ the fixing portion} 431 to smoothly stretch the umbrella 
When stretching the umbrella , { HEAD ~ the protruding button } 51 at the fastening device 5 is steadily locked at the fastening orifice 432 at { TAIL ~ the fixing portion } 431 to smoothly stretch the umbrella
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH