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Influences of chloride immersion on zeta potential and chloride in concentration of cement-based mat
In this paper, the zeta potential of freshly mixed cement paste and hardened cement pastes, as well as the concentration......
目的 测量老年人健康公平性及各影响因素对不公平性的贡献.方法 提取福建省2013年8-9月开展的第五次国家卫生服务调查中3 050名老......