slide rule Stock Image
by 3quarks
Description
close up of a slide rule
Legal
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Royalty Free License
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Keywords
- architect
- board
- calculator
- computer
- construct
- construction
- design
- draw
- drawing
- instrument
- line
- machine
- mathematical
- mathematics
- reckoner
- rule
- ruler
- sketch
- slide-rule
- slide-ruler
- tea mug"