| 摘要 |
<p>Detecting the presence of metal items (3) passing a predetermined point (8) in a processing line (1) for those items characterised by disposing at least part of an inductive electric circuit (31) adjacent the predetermined point (8) in the processing line (1), and means (24, 25) for detecting changes of inductance of the electric circuit (31) due to the metal items (3) passing the predetermined point (8). <IMAGE> <IMAGE></p> |
