图片出自 http://justacargal.blogspot.com.au/2011/03/winglets.
process in bird wings, especially with regard to winglets
再见了,布里斯班:澳洲区域快线(rex)航空 波音737-800 winglets 经济
阻力的克星航司的新宠翼梢小翼
active winglets: faa certified disruptive technology
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
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