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第四届国际高硫煤加工利用会议于1991年8月25～29日在美国爱达荷州召开。这为推动国际性煤炭加工与煤炭脱硫等各领域的技术研究和开发,起到了积极的推
The 4th International High-sulfur Coal Processing and Utilization Conference was held in Idaho from August 25 to 29, 1991. This has played a positive role in promoting technological research and development in various fields such as international coal processing and coal desulfurization