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2013-05-23 12:21
求翻译：Many aging airplane programs have been established in support of 14 CFR 91, 121, and 129 operational rules, others have been developed in support of certification activities and are required operator activities under an Airworthiness Limitations Section. There are others that Boeing has established that are either info是什么意思？ 待解决
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Many aging airplane programs have been established in support of 14 CFR 91, 121, and 129 operational rules, others have been developed in support of certification activities and are required operator activities under an Airworthiness Limitations Section. There are others that Boeing has established that are either info
问题补充： |
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