It is another object of the present invention to provide a method and apparatus for the sequential monitoring of the working state of {HEAD ~ a production line} which can be widely used in {TAIL ~ a variety} of manufacturing operations 
widely used in
It is another object of the present invention to provide a method and apparatus for the sequential monitoring of the working state of { HEAD ~ a production line } which can be widely used in { TAIL ~ a variety } of manufacturing operations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH