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Probably I have never seen any children from the city. Educated youths were considered a rarity at this time. The adults and children in the ditch came to see us like a revolving door. This was the first time in my life that I heard interesting stories about the countryside that
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In water dispensers, the application requirement for a liquid level sensor is that it does not pollute the water quality, the sensor is not easy to harbor dirt and evil, and it is easy to clean. The principle of the float sensor is to use changes in water level to drive the float
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Professor Hu Xiangming has made fruitful achievements in recent years. He has undertaken more than 20 national, provincial and ministerial level scientific research projects, involving social stability risk assessment and early warning and emergency management system research on
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In the 21st century, fitness and learning have become hot topics.
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Home isolation medical observation should be carried out under the guidance of community medical staff. People should live alone or in a single room, try to use a separate bathroom, take personal protection, and minimize contact with other family members. During the home isolatio
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Although I hate to admit it, this world is so cruel. After we graduate from school, we will be invisiblely divided into three, six or nine levels by society. The higher our academic qualifications, the more respect we can get from others. If our academic qualifications are too lo
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Overview of steel surface treatment technology The core of the steel surface heat treatment process is to make parts have the mechanical properties of "hard on the outside and tough on the inside". There are four common surface heat treatment technologies: induction heating, flam
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