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