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Scientific American, Vol. 63, No. 12 (1890) (1890)
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base of the riage which can be turned through an entire revolu- the projectile has been conveyed from the magazine to carriage is provided with a circular rack engaged by a tion, the application of motors for elevating and train- pinion, also driven by an electric or water motor. the gun,… … © 1890 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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