Image: Wheel mine
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Description: An explosive contraption from the Huolongjing. The device is operated by steel wheels contained in two boxes. When pressed, the wheel boxes are supposed to ignite a spark reaching the buried gunpowder packages, setting off the explosion.
Title: Wheel mine
Credit: Own work
Author: Yprpyqp
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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