Here is not rare the aluminium... beer cans exist since decades and other 1,000 kinds of kitchen recipients made from him, but not all the pistols detects it. The absorptive pistol can detect items buried 5-10 years. I remember I detect with it very easy a Nintendo token with a new coin, the both in the same place, one very near the other, "in touch", but seems also here exist a kind of bimetalic effect, because this detection was very very clear. But a "cemetery" of beer cans don't be detected, I surrounded it, and zero detection.
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