Ink is sprayed out from the nozzle by a certain pressure, while the drive rod shake in required frequency and amplitude so as to split the ink into drops, then the machine charge the ink drops. Ink drops with different electric quantity charged are deflected by the force generated in the high voltage electric field. Meanwhile, through the movement of the products, we got the image-text coding information we need.
Access control is often a system enabling authorities to control use of areas and resources inside a given physical facility or computer-based information system. Access control is, actually, a typical, everyday phenomenon. For example, a lock on the car door is essentially a kind of access control. The PIN over a bank's ATM method is another way of access control. Even nightclub bouncers, standing in front of your door, are another illustration of (perhaps) a much more primitive mode of access control. Using an access control mechanism is essential when persons seek to secure confidential, important, or sensitive information and equipment.
The engine is one of the important parts of the car withoutan engine; you cannot start or even run the car. Therefore, you have to careabout the engine and find an appropriate company who always do your car maintenance work. It is better to hire one  company from the start for car maintenance and repairing work of the car because if  you  take a car todifferent mechanic then everyone will tell you a different story about  the  carfaults. That is the reason why it is better to hire one professional car mechanical company, Many Autos LTD provide you Car repair and maintenance service every month  that  would protect the health of your car.
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.
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