矿用高强度圆环链条用２０ＭｎＶ圆钢研制成功“２０ＭｎＶ矿用高强度圆环链条用圆钢”的研制是济南钢铁集团总公司１９９５年１２项新产品计划开发项目之一。在总公司领导的直接关怀及经营处、计划处、总调的大力支持与精心组织下，机制公司、初轧厂、二小型与钢研所积极... Mining high-strength circular chain with 20MnV round steel successfully developed “20MnV mine ring with high strength steel,” the development of Jinan Iron and Steel Group Corporation in 1995 12 new product development projects. In the head office of the direct care and operations office, planning department, the main tune of the strong support and careful organization, the mechanism of the company, the first rolling mill, two small and steel research institute active ...