同志们 :1 991年 5月我们召开了齐鲁石化公司第三次科技大会。四年后的今天 ,我们在三十万吨乙烯工程各套装置全面达标 ,乙烯、化肥、炼油“三大改造”拉开帷幕 ,生产经营创历史最好水平的大好形势下召开第四次科技大会 ,这是我公司科技工作的又一次盛会。这次大会的主要任务是 Comrades: In May 991 we held the third science and technology conference of Qilu Petrochemical Company. Today, four years later, we held the fourth science and technology in a situation where each set of 300,000-ton ethylene engineering equipment was fully up-to-standard, and the “three major transformations” of ethylene, chemical fertilizers and oil refining kicked off, and the production and operation were the best in history. The General Assembly, this is another great event for our company’s science and technology work. The main task of this conference is