| http://www.w3.org/ns/prov#value | - Further, by setting the threshold values with respect to rising and falling in the detected signals at the levels of 5/8 of the maximum value and 3/8 of the minimum values, respectively, there is an advantage in that the apparatus can work well regardless of the change in the level of the detected signals caused by the floating of the base paper or the like, or of the foreign noise caused to the d
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