自制航空器特许飞行证和限用类特殊适航证颁发和管理程序

自制航空器特许飞行证和限用类特殊适航证颁发和管理程序

59 Pages · 2015 · 10.76 MB · Chinese
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“ The butterfly counts not months but moments, and has time enough. ” ― Rabindranath Tagore
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