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