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长度计量基准
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长度计量基准
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米定义
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primary standard of length
长度计量基准
以现代科学技术所能达到的最高准确度保存和复现长度单位“米”的整套装备。
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international arbitration
International Archives Day
International Assciation for the Evaluation of Educational Achievement
International Association for Bridge and Structural Engineering
International Association for Computational Mechanics
International Association for Continuing Engineering Education
International Association for Cross-Cultural Psychology
International Association for Fire Safety Science
International Association for Forensic Phonetics and Acoustics
International Association for Hydro-Environment Engineering and Research
International Association for Landscape Ecology
International Association for Mathematics and Computers in Simulation
International Association for Physical Education in Higher Education
International Association for Sports and Leisure Facilities
International Association for Sports Information
International Association for the Computer Sports Science
International Association for the History of Religions
International Association for the Philosophy of Sport
International Association for the Plant Protection Sciences
International Association for the Study of Insurance Economics
International Association for Water Law
International Association of Airport and Seaport Police
International Association of Applied Linguistics
International Association of Applied Psychology
International Association of Broadcasting
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