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Tulun, city, Irkutsk oblast (region), east-central Russia. It lies along the Iya River and the Trans-Siberian Railroad. Incorporated first in 1922, it changed to a rural settlement in 1924 and was reincorporated in 1927. It is a centre for the Azey lignite (brown coal) field and of the wood and forest industry. Pop. (2006 est.) 49,368.

This article was most recently revised and updated by Michael Ray.
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