Piston rings are manufactured and classified on the basis of function and usability. The primary usage of the Piston Ring is to seal the chamber (where the piston is moving), which can be a combustion chamber of a 2 stroke or a 4 stroke engine. Marine engines have three or more types of rings fitted on the circumference of the piston.
In 2-stroke large engines, compression type piston rings are used to seal the combustion chamber and wiper rings are installed below them to wipe the deposits from the liner and distribute oil on the liner surface.
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The standard for measuring image sharpness is resolution, and the unit is pixel. The larger this value, the clearer the image. The so-called HD, SD, the difference is also reflected here. The dividing line between the two is megapixels or 720p, reaching megapixels or 720p is HD. Based on such standards, CIF and D1, which currently dominate the video surveillance market, are standard definition.
Whether it is from the perspective of resolution, display effect or fluency, HD has more advantages than SD. In terms of resolution, the resolution of 720p is 9 times that of CIF, the resolution of 1080i/1080p is 20 times that of CIF, and in the same display environment, HD will be much clearer. From the display effect, HD supports both large-screen display and 16:9 wide-screen display, which can greatly enhance the user's viewing experience. In terms of fluency, HD supports higher frame rates. For example, 720p and 1080i/1080p can both support 60 frames per second or 60 fields per second, and its image fluency is twice as high as standard definition. Therefore, high-definition monitoring will inevitably replace standard definition monitoring.
The piston ring is an essential piston part, and its numbers and functionality differ depending on the type and capacity of the engine.
What is HD monitoring
For video surveillance, image clarity is undoubtedly the most critical feature. The clearer the image, the more obvious the details, the better the viewing experience, and the higher the accuracy of application services such as intelligence. So image clarity is the eternal pursuit of video surveillance.