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Alcohol drunk and nevertheless the display shows 0,00 promille?
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Alveolar air - what is this?
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CA 7020 in continuous use
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Can I calibrate the CA 7020 myself?
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Cash on delivery or prepayment?
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Display too high
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Display too low
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What are the costs of the review (including shipping / packaging)?
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When or how often must the device be checked?
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Why € 78,00? There are cheaper devices.
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