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airworthiness approval
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airworthiness approval
Encyclopedia
工学
航空器适航性
释
airworthiness approval
适航批准
中国民用航空局为某一航空器、航空发动机、螺旋桨或者零部件颁发的证件,表明该航空器、航空发动机、螺旋桨或者零部件符合经批准的设计并且处于安全可用状态。
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risk consequence of tunnel and underground engineering
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