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我于八○年五月份有机会参加了冶金部在首钢矿山公司组织的与美国ESCO公司的技术交流.听了他们的情况介绍.看了幻灯,浏览了该公司留下的一些资料.
In May of this year, I had the opportunity to participate in technical exchanges organized by the Metallurgical Department with Shougang Mining Company and ESCO Corporation of the United States. After listening to their briefing, I saw the slideshow and browsed some of the information left by the company.