发行时间：2020.10.09
总页数：28
编辑：
综保科技
摘要：
our task is to ensure that american military superiority endures, and in combination with other elements of national power, is ready to protect americans against sophisticated challenges to national security.
— 2017 national security strategy
it is the policy of the united states to use radiofrequency spectrum (spectrum) as efficiently and effectively as possible to help meet our economic, national security, science, safety, and other federal mission goals now and in the future.
— presidential m...
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