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Chapter 131 Different pupil metamorphosis
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... , is becoming more and more abundant.
Especially the identification of its metal composition, the final conclusion is that the gold content is 78.3%, and the brass content is 21.7%.
These two sets of data are very close to the data of 80% gold and 20% copper recorded in historical books. Because of the different eras and different levels of technology, these two sets of data can even be said to be consistent.
According to the composition ratio, this is not a copper g ...
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