The Most usefull links are as below:

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Iran Chamber of Commerce,Mines, Industries and agriculture

http://en.iccima.ir/        

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 Ministry of Economic Affairs and Finance, Bab Homayoon St., Emam Khomeini Sq 
Tehran
IRAN

TEL: +98 21 33 96 72 21

Fax: +98 21 33 96 72 20

http://www.mefa.ir/

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Trade Promotion of Iran

http://eng.tpo.ir

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Chamber of commerce for Trade Promotion with Iran, Hyderabad

www.irantradepromotion.com

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Indo- Iran Chamber of Commerce - Bangalore

www.indoiranchamber.com