Answer:
what is lever bar?
It consists of a small glass tube containing alcohol or similar liquid and an air bubble; the tube is sealed and fixed horizontally in a wooden or metallic block or frame with a smooth lower surface. The glass tube is slightly bowed, and adjustment to the horizontal is indicated by movement of the bubble.
What is level bar and its uses?
A level is a tool used to determine whether a surface is horizontal (level) or vertical (plumb). ... The most basic such tool is a spirit level, which indicates level and plumb with a bubble inside a liquid-filled vial.
Explanation:
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