| 摘要 |
<p>Device characterised by means (5, 6) for recording the shape of the metal plate, means for determining therein three portions corresponding, respectively, to the head, to the body and to the foot of the metal plate, means for determining a useful zone in the body of the metal plate and means for calculating, in the useful zone, various values making it possible to determine different parameters which characterise the "sabre" (= longitudinal bending).
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