The components passing over the optical inspection window may be inspected on the fly, without requiring {HEAD ~ stoppage} of {TAIL ~ each} of the components thereabove 
The components passing over the optical inspection window may be inspected on the fly , without requiring { HEAD ~ stoppage } of { TAIL ~ each } of the components thereabove
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH