The original description page was here. All following user names refer to en.wikipedia.
摘要
Cursor of an inexpensive slide rule. The front and back cursor lines are fixed relative to each other, and a small steel leaf spring, visible at the top, provides friction.
La bildo estas kopiita de wikipedia:en. La originala priskribo estas: == Summary == Cursor of an inexpensive slide rule. The front and back cursor lines are fixed relative to each other, and a small steel leaf spring, visible at the top, provides fr