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