There is an entrance 11 on a surface of {HEAD ~ the scanner housing structure} 10 for feeding therefrom {TAIL ~ an article} to be scanned 
for feeding
There is an entrance 11 on a surface of { HEAD ~ the scanner housing structure } 10 for feeding therefrom { TAIL ~ an article } to be scanned
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH