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铀系年代测定
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铀系年代测定
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铀系年代测定
应用自然界放射性核素(铀钍系、不平衡铀系)衰变规律来确定各种地质对象年龄的一种同位素地质年代学方法,即通过测定样品中铀系衰变子体与母体的比值计算样品年龄,诸如采用传统α能谱与热电离质谱铀系技术(TIMS)进行U-Hh测年。
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Provisions on Development and Construction in Contiguous Areas of Jinshanmeng of Water and Soil Conservation
provisions on health protection for military training
provisions on lightning protection devices for on-site mechanical equipment
Provisions on Management of Satellite Television and Broadcasting Earth Receiving Facilities
Provisions on the Administration of Amusement Parks
Provisions on the Administration of Anti-Disaster Fortifications for Municipal Utilities
Provisions on the Administration of Archival Filing of Export Food Production Enterprises
provisions on the administration of qualifications of urban and rural planning units
Provisions on the Administration of Students in Regular Institutions of Higher Education
Provisions on the Administration of the Development and Utilization of Urban Underground Space
provisions on the administration of urban earthquake resistance and disaster prevention planning
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