Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by material processed]
7. textile working equipment
8. [textile fabricating tools and equipment]
9. fabric testers

Anotations

Scope note:

Devices used to measure the exact level of twist, or the spiral arrangement of fibers around the axis of yarn, inside a spun yarn sample. To calculate this measurement, these devices work to remove the twist by mechanically rotating a yarn sample held between two moveable clamps with a defined tension rate. The number of rotations needed to untwist the yarn's fibers are then calculated. The higher the twist measurement, the stronger the yarn is determined to be.