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Bubble LevelA precision leveling instrument consisting of a tube, filled with a liquid, and a trapped bubble of air. As the tube is positioned so its surface is perpendicular to gravity the bubble will center itself between a series of reference lines. The accuracy of a bubble level is typically expressed in fractions of an angle, for example; 10 arc-second bu [..]
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Bubble LevelIs a leveler attached to an RV, usually one the front and one on the side to assist in leveling your RV. Bump Steer:
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