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Logistics refers to the overall planning, implementation and management of raw materials, semi-finished products, finished products or related information through transportation, storage, and distribution in order to meet the needs of customers at the lowest cost.
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.
The first step is pulping. If you use trees and grass to make paper, you must first chop the trees and grass, then steam it in a large pot until it is rotten, and then put the steamed liquid (professional called pulp) out of the pot.
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!