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A Special Data Management System
yan xian guo 1; tang xian feng 2; zhang sheng ping 3 (1.taiyuan heavy machinery institute; taiyuan 030024; china; 2.dalian crane (group) ltd.co.dalian; 116022; china; 3.linfen iron and steel co.ltd.lifen 041000; china)
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..............page:9-13,17
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