| http://www.w3.org/ns/prov#value | - Numeral 531 indicates a capacitor connected between the normal-open contact 52 of said switch and the positive outlet of the power source, numeral 54 is a resistor connected between said normal-open contact 52 and the base of a transistor 55, numeral 56 is a diode for protection from surge voltage connected in parallel with the electromagnetic coil 30 connected to the collector of said transistor
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