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Suppose I am trying to teach a class of 12 children how to build campfires. I would like each pupil to have a flint and steel for the lesson. As it turns out ferrocerium rods can be acquired cheapl...
Suppose I am trying to teach a class of 12 children how to build campfires. I would like each pupil to have a flint and steel for the lesson. As it turns out ferrocerium rods can be acquired cheapl...