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Title: Enough cup thermal insulation was not possible
Review: The rating watt of this product was 17 watts. It was place, 53-55 degrees centigrade that measured surface temperature. Because wattage was low, cups enough for the surface temperature were not temperature to keep it warm, and there were not enough effects for cup thermal insulation. I expect a product with constant thermal effect (surface temperature 78-80 degrees centigrade).
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