关键词：化工；二氧化钛；聚碳酸酯；进出口；天然气
摘 要：Over past two decades, with the “going out” strategy, China’s petroleum giants, PetroChina, Sinopec and CNOOC have already established cooperation zones in Africa, the Middle East, Central Asia, Russia, the Asia-Pacific Region and South America through M&As.
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