“North American Air Defense Agreement”的概念、定义、翻译、参考文献-科学参考

单词	North American Air Defense Agreement
释义	North American Air Defense Agreement Encyclopedia 历史学加拿大历史释 North American Air Defense Agreement《北美防空协定》加拿大与美国于1957年8月1日公布、1958年5月12日正式签署的防空合作的协定。
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