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    Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool causing fusion.Welding is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal.. In addition to melting the base metal, a filler material is typically

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    :. 1. (200 9 ~ ) 。. 2. (2002 ~ ) 。. 3. " Journal of the Chinese Society of Mechanical Engineers " Editor-in-Chief (1993 ~ ) 。. 4. " Int. J. of Heat and Mass Transfer " Honorary Editorial Advisory Board 。

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    Bread, beer & yeast The history of bread and cake starts with Neolithic cooks and marches through time according to ingredient availability, advances in technology, economic conditions, socio-cultural influences, legal rights (Medieval guilds), and evolving taste.

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