spirit levels

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  5. Measuring Devices (hierarchy name)
  6. measuring devices (instruments)
  7. [measuring devices for extent]
  8. distance measuring devices
  9. angle measuring devices
  10. spirit levels
Scope note
Devices for determining true horizontal or vertical angles by the centering of a bubble with a glass tube or circular case filled nearly to capacity with alcohol or ether.
spirit levels
Accepted term: 10-Mar-2025