30 April 2009
in simple words, when some producer is dumping the goods in the country at very low price (mostly lower than cost) which is affecting local industry then a duty is imposed which is equal to difference between its exports price (at which it is dumpped) and its normal value to offset the the dumping effect.
19 May 2009
To add to Atuls comments - the large corporations at times have a strategy to close all local competition. Therefore they would sell at low prices which the domestic industry cannot afford. Since the large corporaitons have a very deep pocket they can substain losses. Once Indian companies close then they will provide their products at their terms. To avoid this happenning this is done. Countries which usually are known for this are mainly companies from China + East europeon countries,.