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The gate is a detector that detects if there are metal objects, or metal detection doors. Mainly used in airports, stations, large conferences and other popular public places to check people's physical hidden metal objects, such as guns, controlled knives and so on. When the inspectors from security through, carries on the body shape of metal more than according to the weight, quantity or predefined parameter value, the security immediately alarm, and display alarm caused by metal and location, make security personnel find such person carry metal items in a timely manner
Although 'cool' really should not be the attribute you should be focusing on while picking a car for young drivers, where safety needs to be priority number one, still wouldn't hurt to get a car that make the child look really good and will have fun driving it. It's not impossible to find a vehicle that combines those qualities, you just need to do a little research, see which cars are preferred among the young crowd and after that decide if there is one that's safe enough, that also has good fuel economy, with low insurance costs.
Self-cleaning filter adopts international advanced equipment technology, water treatment industry can be vertical, horizontal, the horse any direction at any position, can be used in industry, agriculture, municipal electric power, electronics, medicine, food, printing and dyeing, construction, steel, metallurgy, paper and other water filtration in all walks of life.
The world intellectual property organization in 1977 edition of the licensing handbook "for developing countries to use, to the definition of technology:" technology is knowledge for the manufacture of a product system, the adoption of a process or provide a service, regardless of whether this knowledge is reflected in an invention, a shape design, a utility model, or a kind of new plant varieties, or reflected in technical information or skills, or reflected in the expert for the design, installation, run a factory or maintenance or for managing a business or its activities and provide services or assistance, etc." This is by far the most comprehensive and complete definition of technology in the world. In fact, the intellectual property organization defines all the scientific knowledge that can bring economic benefits to the world as technology
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