A (pair of) drawing compass(es). The rotation point of the legs are set at the screw points so resizing them should be very easy with Inkscape 図面 技術 アーキテクチャ 図面をコンパス
A (pair of) drawing compass(es). Similar to the other in my collection except this one includes the adjusting wheel. 学校 教育 図面 コンパス 2
Remember back to the days of the 80s when these were banned in school and were confiscated on a regular basis. No scientific stuff here, just a plain and simple old fashioned calculator with a seven segment display 学校 レトロ 数学 古い電卓
The same as my other blue ruler, however in the first one the numbers are left as fonts, but in this one they are converted to curves. 図面 測定 学校 青いルーラー 2