Detectors are provided in {HEAD ~ each working group} of {TAIL ~ the production line} to output signals to a microcomputer 
of
Detectors are provided in { HEAD ~ each working group } of { TAIL ~ the production line } to output signals to a microcomputer
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