A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto.
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How many times has Donald Trump disqualified himself from holding the most powerful job in the world? You be the judge. By Chris Kirk, Ian Prasad Philbrick, and Gabriel Roth. It has been 13 months since Donald Trump announced his presidential bid and, in the same speech, called Mexican immigrants rapists. The ensuing drip feed of Trumpian absurdities and offenses has had a desensitizing effect.