Articles withdrawn from bonded warehouses, bonded manufacturing warehouses, continuous customs custody elsewhere than in a bonded warehouse, or from a foreign-trade zone, imported articles, and articles of domestic manufacture or production, laden as supplies upon any such vessel or aircraft of the United States or laden as supplies (including equipment) upon, or used in the maintenance or repair of, any such foreign vessel or aircraft, shall be considered to be exported within the meaning of the drawback provisions of this chapter.