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assay certificate

  • The Air Regulations of 1926 stated, "It shall be unlawful to serve as an airman in connection with any aircraft registered as an aircraft of the United States without an airman certificate."

    1926年航空法规规定,“任何没有获得航空从业执照人,服务于美国注册飞机非法的。”

    cneaa.net

  • The Air Regulations of 1926 stated, "It shall be unlawful to serve as an airman in connection with any aircraft registered as an aircraft of the United States without an airman certificate."

    1926年航空法规规定,“任何没有获得航空从业执照人,服务于美国注册飞机非法的。”

    cneaa.net

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