FIG 5 shows {HEAD ~ the protective ring} 4 mounted around an inner barrel 1 inside the housing 2′ of {TAIL ~ another structure} of hot air blowing gun 
FIG 5 shows { HEAD ~ the protective ring } 4 mounted around an inner barrel 1 inside the housing 2′ of { TAIL ~ another structure } of hot air blowing gun
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH