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2. Threading (epilation) - Wikipedia

   en.wikipedia.org/wiki/Threading_(epilation)

   Threading became popular in the United States beginning in the late 1980s, when immigrants from these countries began setting up threading studios in large American cities. [6] [4] It has increased in popularity since then. [7] [8] According to The Guardian, in the United Kingdom, online searches for threading services increased by 50% in 2015. [9]

3. Contour threads - Wikipedia

   en.wikipedia.org/wiki/Contour_threads

   Contour threads are used in cosmetic/plastic surgery to vertically lift facial tissues that have dropped ("ptosed") or become sunken with age. The "ptosis" or descent of facial tissues with aging is a universal phenomenon to which much cosmetic facial surgery is directed.

4. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   Without a tap drill chart, you can compute the correct tap drill diameter with: T D = M D − 1 N {\displaystyle TD=MD-{\frac {1}{N}}} where T D {\displaystyle TD} is the tap drill size, M D {\displaystyle MD} is the major diameter of the tap (e.g., 3 ⁄ 8 in for a 3 ⁄ 8 -16 tap), and 1 / N {\displaystyle 1/N} is the thread pitch ( 1 ⁄ 16 ...

5. List of body piercings - Wikipedia

   en.wikipedia.org/wiki/List_of_body_piercings

   This page was last edited on 21 February 2025, at 23:00 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

6. Buttress thread - Wikipedia

   en.wikipedia.org/wiki/Buttress_thread

   In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

7. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Once the bit has penetrated a wall, a wire can be threaded through the hole and the bit pulled back out, pulling the wire with it. The wire can then be used to pull a cable or pipe back through the wall. This is especially helpful where the wall has a large cavity, where threading a fish tape could be difficult. Some installer bits have a ...