Glossary entry (derived from question below)
English term or phrase:
keystone ring
Portuguese translation:
anel trapezoidal
English term
Brazil
Native in: Portuguese 
keystone ring
| 4 | anel trapezoidal |
Oliver Simões
|
| 3 | Anel trapezio, |
Tomasso
|
| 3 | anel T |
ferreirac
|
| 3 | anel keystone |
Clauwolf
|
Dec 15, 2022 14:50: Clauwolf changed "Level" from "Non-PRO" to "PRO"
PRO (3): Mario Freitas, Bruna Mattos, Clauwolf
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Proposed translations
United States
BA in Transl., MA in ESL, 15 yrs of exp.
Native in: Portuguese 
Works in: English to Portuguese, Portuguese to English, Spanish to Portuguese, and 2 more.
anel trapezoidal
http://google.com/search?q="anel trapezoidal" "keystone ring...
anillo trapezoidal (ES): https://www.techdico.com/translation/spanish-english/anillo ...
Anel trapezio,
en/products/keystone-ring ""KEYSTONE RINGS
Contrary to the fact that both sides are in rectangular rings, they are rings obtained by arranging them in the form of a trapese (trapazoid), not in parallel. The angle value is usually 6°, 15°, 20°. This trapezoidal design can be made on both sides and can be made double-sided as well as on single-sided keystone rings. Half keystone rings have no angles at the bottom edges and the ring is at right angles to the working surface.
Anel-pistao-motor-scania- Anel pistao motor scania hw / 113 - trapezio
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Note added at 1 hr (2022-12-14 03:11:26 GMT)
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https://www.yenmak.com.tr/en/products/keystone-rings-458
https://eusebiopecas.com.br/produto_1440-1_U_Anel-pistao-mot...
https://yenmak.com.tr/pt/produtos/tipos-de-anis-497
Ao contrário do fato de que ambos os lados estão em anéis retangulares, são segmentos obtidos organizando-os na forma de um trapézio, não em paralelo. O valor do ângulo é geralmente 6 °, 15 °, 20 °. Esse design trapezoidal pode ser feito em ambos os lados e em ambos os lados, bem como segmentos trapezoidais de um lado. Os anéis trapezoidais de um lado não têm ângulos nas bordas inferiores e o anel está em ângulo reto com a superfície de trabalho.
Ao contrário do fato de que ambos os lados estão em anéis retangulares, são segmentos obtidos organizando-os na forma de um trapézio, não em paralelo.
anel T
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