[Rhubarbodendron]

propita wrote:

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So it's similar to a pressure cooker, but not a pressure cooker?

Not exactly. The effect is similar to a pressure cooker, but the device itself is something completely different. It's basically just a heavy clamp that holds the lid on a pot down extremely tightly. This way the pressure builds up much higher than in a normal pot and that in turn gets a cooking result similar to a pressure cooker.