File:Hudunpao-huolongjing.jpg
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Summary
| Description |
English: The hu dun pao in the Huolongjing |
| Date | |
| Source | Immediate source: Science and Civilisation in China. Volume 5. Chemistry and Chemical Technology. Part 7. Military Technology: The Gunpowder Epic by Joseph Needham. page 279 |
| Author | Jiao Yu |
Licensing
|
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 70 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, 1931. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:13, 21 July 2016 | | 426 × 583 (174 KB) | Underbar dk | User created page with UploadWizard |
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