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With the increase of national investment in education informatization, projectors are widely used in primary and secondary schools when they build computer classrooms and multimedia classrooms. As a...

A projector, also known as a projector, is believed to be familiar to many people, and most of them have been exposed to this device in school. It is usually a device that can project images or...

On the other hand, projection is jointly created by electronic technology, optical technology, and microchip manufacturing technology, but there are only a handful of manufacturers in the world that...

Many families choose to camp outdoors on weekends or vacations, away from the hustle and bustle of the city and in close contact with nature. All kinds of camping equipment emerge in an endless...