Windows95 numerical control system is mainly developed in the environment using object-oriented programming language, making full use of technology to encapsulate functional modules in the control, so that the structure of the system is organized more clearly and orderly, which is convenient for function expansion and tailoring. Because it is an open operating system, it is easy to implement open features in the CNC system. The program does not necessarily guarantee that a message will be received on time. Obviously, this timing method cannot meet the high-precision real-time requirements of the system. Multimedia Timing Interrupt: Due to the need of multimedia, the timing of the system is reprogrammed, providing more accurate timing services in its multimedia extension library. Through these functions, a callback function that can hook a timer interrupt is implemented to implement a timing service with millisecond precision, such as a related timing function definition. Real-time interrupt research under the platform: real-time control is the key technology of the numerical control system. The functions of the system control part in real-time control mainly include timing sampling, real-time and dual-port communication, etc., and usually involve the display of graphics, images and real-time data, and the user interface of human-computer interaction. Interrupt technology is the driving force behind these functions. (Finish)
The fundamental reason why leather is soft is that when leather is made, oil is introduced into the interior of animal skin to form an oil film that completely covers the surface of the fibers inside the skin, that is, a layer of oil film with appropriate thickness is used to separate the surface of the fibers inside the skin. In this way, the friction between the fibers inside the leather is equivalent to the friction of the oil molecules, so the leather will be very soft. Its principle is similar to that of sponge, but the difference is that the inner surface fibers of dermis are separated by oil film, which makes the inner surface of dermis have sliding pores, but its pores are smaller than that of sponge, and the distribution of the inner surface fibers of dermis is not as regular as that of sponge.
Leather cleaner is used to clean leather clothes, leather sofas, leather bags, leather chairs, leather shoes and other leather products. Leather cleaning generally refers to the cleaning of the surface of leather products, excluding the cleaning inside.
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