It is therefore {HEAD ~ an object} of the present invention to provide {TAIL ~ an apparatus} for measuring the internal stress generated in a strip during the rolling process thereof, which apparatus is capable of measuring the internal stress continuously, without smearing the rolled surface of the strip 
It is therefore { HEAD ~ an object } of the present invention to provide { TAIL ~ an apparatus } for measuring the internal stress generated in a strip during the rolling process thereof , which apparatus is capable of measuring the internal stress continuously , without smearing the rolled surface of the strip
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