transparency
タグをコピペすると、ブログなどにカンタン貼り付けできます。
各画像のライセンスに従って利用してください。被写体の肖像権、商標・意匠登録等にご注意ください。
詳しくはクリエイティブ・コモンズ・ライセンスの利用についてをご覧ください。

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
![This woman worker at the Vultee-Nashville is shown making final adjustments in the wheel well of an inner wing before the installation of the landing gear, Nashville, Tenn. This [is] one of the numerous assembly operations in connection with the mass prod](http://farm3.static.flickr.com/2020/2179076941_bc61ce4146_m.jpg)
by The Library of Congress
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)
![A fast, hard-hitting new A-20 [i.e., B-25] attack bomber is brought for a test hop to the flight line at the Long Beach, Calif., plant of Douglas Aircraft Company (LOC)](http://farm3.static.flickr.com/2067/2179136573_58686ca6c6_m.jpg)
by The Library of Congress
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)

by The Library of Congress
No known copyright restrictions(著作権制限なし)