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<p>Hello everybody, </p>
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<p>A few weeks ago, I read a paper about Earth Air Heat Exchanger whose authors wrote about type 555 and used it to get the ground temperature (it contained some information to use as input in the model) but I can't find any information about it. </p>
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<p>I wonder if you can help me to find this type.</p>
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<p>Luferova</p>
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