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Farming in the Mountains: Max Level Jiaojiao Is Three Years Old - Chapter 353 - 353 Try It
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... mentioned the temperature-lowering crystallization method. It was said that the dissolution of saltpeter in water would decrease as the temperature of the water decreased. In the end, the dissolution would be so small that crystals would be produced, which would produce saltpeter.
Since it was frozen, the temperature must be very low. Even if the soluble saltpeter was not completely separated, most of it would be seen on the surface of the ice. At that time, he could directly scrape off ...
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