在此： 行业
Aviation Industry
From the pioneering work of the Wright brothers and the first powered flight in
1903 aviation has become a $2.5 trillion a year industry. Encompassing leisure
travel, commercial freight, military applications, manufacturing and research
and development the aviation industry makes up 3.5% of world GDP.
知识锦囊
不好意思暂时没有所查内容……
试试右边调整筛选条件吧
