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However, science and technology are two different social cultures, and the differences between them are obvious. The basic task of science is to know the world and find it, thus increasing the intellectual wealth of mankind. The basic task of technology is to discover the world and invent it to create the material wealth of mankind and enrich the spiritual and cultural life of human society. Science answers questions about "what" and "why"; The technology answers the question "what to do" and "how to do". Therefore, the results of science and technology are different in form. Scientific achievements are generally expressed as concepts, laws, papers and other forms. The technical results are usually in the form of process flow, design drawing, operation method and so on. Scientific products are generally not commercial and technological achievements can be commoditized. Modern technology has a strong utilitarian and commercial color.
In 1981, car manufacturers started assigning a distinctive, 17-character code to every vehicle that is built, that is utilized for assorted purposes, but mostly for verifying the legitimacy of vehicles. Governments and police officers agencies apply it to recognize stolen vehicles, and motorists require it whenever they take their cars to some mechanic, plus its useful when selecting pre-owned car, to help you manage a vehicle history report. The insurance industry often uses vehicle identification numbers, as well. VINs are usually engraved on aluminum plates, cast or stamped, being a bar code, or even in label form, and they is available on a car's steering column, doorjamb, driver's door, passenger side door, dashboard, too as in a vehicle's maintenance book and title.
Self-cleaning strainer is used to clean the drainage system without interruption. It can monitor the working status of the filter and the automation is very high. The requirements for various filtering precision are covered from 10um to 3000um.
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