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DQL-16B Altimeter
Product Overview
Technical Indicators
The protractor’s scale is calibrated in degrees and percentages (0–90°, 0–150%), with a graduation interval of 1°/1%.
Optical focusing is achieved by manually rotating the eyepiece to obtain a sharp image of the scale lines, while ensuring that the eyepiece slit at the height-measuring dial remains horizontal.
The height-measuring dial is supported by jewel bearings, and all moving parts are immersed in a damping fluid that ensures rapid return of the dial to its zero position. The dial surface rotates smoothly and without vibration.
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