Traditional Culture Encyclopedia - Photography and portraiture - Where can I buy a car cd in Pucheng County?
Where can I buy a car cd in Pucheng County?
Brief introduction of CD
Optical disc is an object that uses optical information as the storage carrier to store data. It can be divided into erasable optical disk, such as CDROM, and erasable optical disk, such as CDRW and DVDRAM.
CD-ROM is a device that uses laser principle to read and write, and it is a rapidly developing auxiliary memory, which can store various multimedia digital information such as words, sounds, graphics, images and animations.
It is the carrier of various functional structures, made of polycarbonate, which has excellent impact toughness, wide application temperature range, good dimensional stability, good weather resistance and no toxicity.
Generally speaking, the substrate is a colorless and transparent polycarbonate plate, which is not only the carrier of grooves, but also the physical shell of the whole optical disk. The thickness of the substrate of CD is 1.2mm, the diameter is 1.20mm, and there is a circular hole in the middle, which reflects the shape of CD. The reason why optical discs can be taken and placed at will mainly depends on the hardness of the substrate.
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