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Equivalent Law and Its Application of Hazard-causing Agent
fu en-guang1; wang xin-bing2; zhang jing-kang2; hu yu-lu2; sha ling-bao2(1.shouguang mineral resources management office; shandong shouguang 262700; china; 2.shandong monitoring center of geological environment; shandong jinan 250014; china; )
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