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A plumb bob is a tool utilized in construction, carpentry, and masonry to determine vertical alignment. It typically consists of a pointed weight, often made of metal, that is suspended from a thin cord or string. When the plumb bob hangs freely, the weight causes it to come to a rest in a vertical position, creating a vertical reference line. The use of a plumb bob is essential in ensuring that structures are level and correctly oriented.

Ancestors (6)

  1. Surveying instruments
  2. Geodesy
  3. Applied mathematics
  4. Fields of mathematics
  5. Mathematics
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