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Ball Mill Length And Diameter Ratio Few Vertical Roller Mill Germany

The lenses were bighe focal ratio of a camera is the focal length divided by the diameter of the aperture, the opening where light enters the camerahe bigger the aperture, the more light enters the camerahe 66-inch focal length e-5 was an f5 camera, or 66 inches divided by 5, meaning an aperture 13 inches 33centimeters in diameter.

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