shivangigpt

shivangigpt

249 Hits - May 22, 2021, 2:16 PM - shivangigpt
A vacuum flask is a type of storage container used to retain the temperature of the stored liquid for a long time. It is also known as vacuum bottle, thermos flask, thermos bottle, or Dewar flask as Sir James Dewar invented it in 1892.
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May 22, 2021, 2:16 PM - shivangigpt