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standards and recommended practices
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avia.
标准与推荐条款
Standard and Recommended Practices
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标准及推荐措施
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标准和推荐实践
Standards and Recommended Practices
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标准与推荐实例
国际民用航空组织出版的
standard and recommended practices
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econ.
标准和推荐作法
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Standards and Recommended Practices
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