A Scale Dials is a type of instrument that displays numerical values by means of a scale mark and a pointer or indicator. Usually, the dial consists of a circular disk, the disk is divided into evenly distributed scale lines, each scale represents a certain numerical unit. The pointer rotates with the change of the physical quantity to be measured, pointing to the corresponding scale, thereby visually displaying the measurement result. The user can quickly and accurately read the current state or measurement results of the device. During the adjustment process, the dial also serves as an operating guide to help the user accurately adjust the required parameters to ensure the normal operation of the equipment and the accuracy of the measurement results. As an intuitive display tool, its core lies in the carefully designed scale lines and logos on its surface, which together form a bridge between the user and the device. It is not only a simple disc, but also an indispensable part of precision instruments, measuring equipment and various control systems.

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