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US4020969A Lid of a receptacle for instant cooking food 失效
盖上即时烹饪食物的容器

Lid of a receptacle for instant cooking food
摘要:
A lid for a receptacle containing instant-cooking foods. The lid has an upper layer attached to a lower layer, and one of the layers is either perforated to be easily rupturable or has at least one opening therethrough. Furthermore, the upper layer has at least one portion extending beyond the edge of the lower layer.
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