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How is a Microwave Built? Microwave ovens have brought home convenience to a new level. They are designed to fit in wall cabinets or on top of kitchen islands. They are also manufactured from a variety of materials. In 1940 the cavity magnetron tube emitting microwaves was created at Birmingham University in England. Percy Spencer realized that this device could heat food as he observed eggs and corn pop cook. Raw Materials Microwave (MW) heating has been gaini
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