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Image: RML 11-inch 25-ton gun diagrams

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Description: Diagrams showing barrel cross-sections of British RML 11 inch 25 ton guns Mk I and Mk II.
Title: RML 11 inch 25 ton gun diagrams
Credit: Plate XV in "Treatise on the Construction and Manufacture of Ordnance in the British Service" by Captain John F Owen R.A. Prepared in the Royal Gun Factory, London, 1879. Downloaded from https://archive.org/details/treatiseonconst00owengoog
Author: Royal Gun Factory
Permission: This work created by the United Kingdom Government is in the public domain. This is because it is one of the following: It is a photograph taken prior to 1 June 1957; or It was published prior to 1973; or It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1973.HMSO has declared that the expiry of Crown Copyrights applies worldwide (ref: HMSO Email Reply) More information. See also Copyright and Crown copyright artistic works.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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