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Mawachi a location in the Bawlake district of the Kayah State (also called Karenni State) is a state of Myanmar and formerly in the Karenni States of Burma. In the 1930s, the Mawchi Mine was the most important source of tungsten in the world.
Map of Mawchi, Myanmar (Burma)
References
Mawchi Wikipedia(Text) CC BY-SA