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Carbon film resistors are a type of film resistor. It uses high-temperature vacuum coating technology to closely attach carbon to the surface of the ceramic rod to form a carbon film. The thickness of the carbon film determines the size of the resistance, and the thickness and notch are usually used to control the resistor. The rated power of the film film resistor is not marked on the housing of the resistor, but is distinguished by the length and diameter of the electron gun. The resistance range of Carbon Film resistors is 1Ω~10MΩ.