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多环芳烃(PAHs)是污染土壤中常见重要污染物,2014年《全国土壤污染状况调查公报》中指出,”我国土壤中PAHs点位超标率达1.4%”;污染区土壤中苯并[a]芘(BaP)含量高达82mg/kg。土壤PAHs污染的危害很大,不仅直接导致粮...
Materials and Design The Art and Science Material Selection in Product Design Second Edition
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MANUAL OF STEEL CONSTRUCTION ALLOWABLE STRESS DESIGN NINTH EDITION PART 2 BEAM AND GIRDER DESIGN
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