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  1. Baball

    Manual of the Pneumatic Mail Mystem for the TB-3

    Here's the manual for the pneumatic mail system used on the Tupolev TB-3, dated 1934, that I've foundon airforce.ru . I never knew there was such a system ever used on an airplane. Enjoy!
    • Baball
    • Thread
    • communication mail manual pneumatic tb-3 tupolev
    • Replies: 1
    • Forum: Communication
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