| http://www.w3.org/ns/prov#value | - Control circuit 30 is coupled to an operator input device 32 which includes one or more push button switches 34 (see FIG. 3), but may alternatively include other user input devices, such as, switches, knobs, dials, etc., or more advanced input devices, such as biometric devices including fingerprint or eye scan devices or even a voice-actuated input control circuit configured to r
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