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The thermos bottle can not only keep heat, but also keep cold things at lower temperature. When a popsicle is put in, it can also isolate the hot air from outside from entering the bottle, and the hot and cold air cannot be convective to achieve the effect of keeping cold.
The current CNC processing in the modern era can not escape the fate of all industries, and some errors will also occur in the processing process, mainly including the following seven errors
The concept of a thermos bottle is very simple: the bottle has an inner wall and an outer wall; there is a vacuum between the two walls, and there is nothing (not even air inside). Heat cannot be transferred through the vacuum, so any liquid poured into the bottle can maintain its original temperature for a long period of time.
Pour boiling water into the thermos cup and tighten the cork or lid clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hands.
Bento has existed since ancient times, and in modern society, it is more common due to the continuous growth of office workers. A delicious and nutritious bento can not only supplement the body's needs, but also make the mood happy.
What is a good dish to bring for lunch? 3 dishes that are suitable for lunch boxes, not easy to spoil and nutritious!