丁てい定じょう規ぎ

noun

T-square

A T-shaped ruler used in technical drawing for drawing horizontal lines and as a support for triangles. The cross-reference to Ｔ定規 indicates an alternative spelling.

See also: Ｔ定規

• 製せい図ずの授じゅ業ぎょうで丁てい定じょう規ぎを使