Using special stainless steel baking roller to ensure the coffee beans can be roasting equally. for its fast heating up and slow cooling down features energy can be saved efficiently.

烘焙滚筒为特殊不锈钢，以确保加热均匀，积热快，散热慢，可节约能源。

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The result is that the triple junction has a tendency to pump fast electrons from the metal into the superconductor, cooling the metal down.

ECONOMIST: Microrefrigeration