美国
学习制造和测试大炮——提高自己，应征入伍，在军械部学习一门技能。`Learn to make and test the big guns – better yourself, enlist and learn a trade in the Ordnance Dept. (1919) by Charles Buckles Falls
美国
在那里学习和赚钱这是美国军械部年轻人的职业和教育`Learn and earn Theres a trade and an education for young men in the Ordnance Department U~S~A (1919) by Charles Buckles Falls
收藏（VIP）
《发射爆炸性炸弹的大炮图》，《大西洋法典》`Drawing of Cannons Shooting Explosive Bombs, Atlantic Codex by Leonardo da Vinci
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