Functions of parts of a thermos flask
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➪Screw-on stopper.
➪Outer plastic or stainless steel case.
➪Outer layer of glass coated with reflective material (or stainless steel in unbreakable flasks).
➪Vacuum.
➪Inner layer of glass (or stainless steel in unbreakable flasks).
➪One or more supports keep inner vacuum container in place.
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Functions of parts of a thermos flask
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