1999年，保国铁矿利用科技档案，成功地完成了铁蛋山采场的深部开采工作。延长采场服务年限 5.3年，为国家创造效益 7200万元（每年上缴财政各项税费 1200万元，技改发挥作用 6年），延长了现有职工的就业时间。由于成效显著，该项目荣获辽宁省科委科技进步二等奖。 保国铁矿于 In 1999, Baoguo Iron and Steel successfully use the scientific and technological archives to complete the deep mining work of the Tieggishan stope. To extend the service life of the stope to 5.3 years and to create a benefit of 72 million yuan for the country (12 million yuan of fiscal taxes and fees paid each year and 6 years of technical reform) to extend the employment period for existing staff. Due to the remarkable results, the project won the second prize of scientific and technological progress of Liaoning Provincial Science and Technology Commission. Baoguo iron ore in