During monitoring, the microcomputer compares signals from {HEAD ~ the detectors} with the corresponding sequence pattern for {TAIL ~ each working group} to monitor the working conditions of the working groups 
During monitoring , the microcomputer compares signals from { HEAD ~ the detectors } with the corresponding sequence pattern for { TAIL ~ each working group } to monitor the working conditions of the working groups
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH