| http://www.w3.org/ns/prov#value | - as to produce the measured signal which is then outputted through the signal output terminal. [0027] Preferably, the electrode forms an electrode area in the through hole whose area is an area of the working surface for processing the electrode action and transmitting the measured signal. [0028] Preferably, the printed conductive film is formed by printing a conductive paste on the isolating sheet
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