National Aeronautics and Space Administration
国家千克基准器
national primary kilogram standard【计量】
暂无补充释义。
相关词条
Nigerian National Petroleum Corp.【油气】
Japan National Institute of Genetics Center for Information Biology
National Information Infrastructure\nNII\n计
NIH（NATIONAL INSTITUTE OF HEALTH）
national economy
National Institute of Health(NIH)
National Research Council