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airworthiness certification
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airworthiness certification
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适航审定
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airworthiness certification
适航审定
适航当局依据适航法规标准,在全寿命周期内对民用航空产品(包括其部件、系统)进行的审查、监督和管理,确保其具有可接受的最低安全水平。
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butadiene acrylonitrile rubber
butadiene-acrylonitrile rubber
butadiene-acrylonitrile rubber; nitrile rubber (NBR)
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