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  • I have read that the radiation level due to radon is affected by rain so maybe if it rained previous to your first reading that resulted in a different level.

    JyakkuinJapan 2 months ago

  • ありがとう。おつかれさまです

    thank you very much

    miguelanonas 8 months ago

  • ありがとう。おつかれさまです

    miguelanonas 8 months ago

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