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A person with an ignition interlock device installed in their car must receive training for the proper technique, to prevent them from having someone else blow into the breathalyzer device or using compressed air.

One kind of ignition interlock device manufactured by Guardian Interlock Systems. A person with an ignition interlock device installed in their car must receive training for the proper technique, to prevent them from having someone else blow into the breathalyzer device or using compressed air. Photo courtesy: Wikimedia Creative Commons

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