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File:L-Karniesbogen (keystone).png

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L-Karniesbogen_(keystone).png (432 × 400 pixels, file size: 44 KB, MIME type: image/png)

Lueger 1904 This image comes from the Lexikon der gesamten Technik (dictionary of technology) from 1904 by Otto Lueger.

Licensing

Public domain

The author died in 1911, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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Captions

Illustration of a keystone (highlighted in red)

Items portrayed in this file

depicts

arch

keystone

File history

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Date/TimeThumbnailDimensionsUserComment
current13:42, 13 October 2020Thumbnail for version as of 13:42, 13 October 2020432 × 400 (44 KB)BelburyHighlight keystone.
13:39, 13 October 2020Thumbnail for version as of 13:39, 13 October 2020432 × 400 (15 KB)BelburyFile:L-Karniesbogen.png cropped using CropTool with lossless mode.

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