瑞典克芮留斯（Craelius）公司是一个从事钻机和钻头生产的历史悠久的公司。去年是该公司成立100周年。1985年10月份在亚太国际钻探会议上，李大佛在会上宣读了金刚石电镀钻头工艺性能的论文后，瑞典技术开发部主任Oden先生在会后决定邀请我方到该公司进行考察并测试电镀金刚石钻头的技术特性及进一步洽谈双方合作的可能。 Craelius, Sweden, is a historic company that produces rigs and bits. Last year was the 100th anniversary of the establishment of the company. In October 1985 at the Asia-Pacific International Drilling Conference, Li Da-fu presented the paper on the performance of diamond plating drill at the conference. After the meeting, Mr. Oden, Director of Technology Development Department of Sweden, decided to invite us to visit the company and test the electroplated diamond Drill bit technical features and to discuss the possibility of further cooperation.