Plumbob for Construction Work Plumbob No.2 with 2 Mtr. Thread
The plumb consists of a specially designed weight and coarse string made of twisted cotton threads.
At one end of the string the weight is affixed. Precisely machined and balanced bobs have pointed tips.
A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line.
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