The document discusses types of dumping such as intermittent, persistent, and predatory dumping. It notes features of dumping include entering foreign markets, selling surplus production, and developing trade relations. It defines anti-dumping action as charging extra import duties on particular products from exporting countries to bring prices closer to normal value or remove injury to domestic industries. Anti-dumping sources mentioned are tariff duties, import quotas, import embargoes, and voluntary export restraints.