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