| http://www.w3.org/ns/prov#value | - The discharging circuit here is formed mainly by the capacitor 38, the variable resistor 37, the transistor 35, the diode 31, the transistor 24 and the diode 40, or by the capacitor 38, the variable resistor 37, the transistor 35, the transistor 22, the diode 33 and the diode 40, due to the inductance of the electromagnetic coil 1.
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