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How is a Microwave Built? Microwaves have elevated the convenience of home to a whole new level. They are designed to fit into wall cabinets or on top of kitchen islands. They are also made with a variety of materials. In 1940 the cavity magnetron tube emitting microwaves was invented at Birmingham University in England. Percy Spencer discovered that this device could cook food after watching corn pop, and eggs cook. Raw Materials Microwave (MW), heating is becoming popular in the material processi
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