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As far as I know a wood (for the "hearth board") has to full fill several characteristics (at least they've to be soft) to be suitable for a friction fire. When in a survival situation, how can I d...
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Source: https://outdoors.stackexchange.com/q/13307 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/