GLONGHUI, May 23 | Philip Morris International (PMI), the world's largest tobacco manufacturer, said on Wednesday that it had acquired an indirect minority interest of 14.7% of Egypt's largest cigarette producer Oriental, but did not disclose the value of the deal. As part of the deal, the two companies will explore areas of potential strategic cooperation, including heated tobacco products. PMI's IQOS heated tobacco equipment has become a global market leader, but the product is mainly popular in developed markets. Recently, PMI has been seeking ways such as cheaper tobacco heating equipment to increase usage in developing markets.