https://blogfreely.net/bugledi....rt5/how-built-in-mic
How is a Microwave Built? Microwaves have taken household convenience to a whole new level. They are designed to fit in wall cabinets or on top of kitchen islands. They are also made using a variety of different 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 the corn pop and eggs cook. Raw Materials Microwave (MW) heating is becoming popular in
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