| http://www.w3.org/ns/prov#value | - With reference to sensor unit 33 the sensor unit provides a natural binary digital numerical output 34 of selected number of bits, depending on the number of positions sensed, to a signal conditioner 56 which, for example including a programmable read only memory which supplies a natural binary digital output A2-B2-C2-D2 in the form of, in this case, a 4 bit natural binary word to a second set of
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