What should engineers do if they don’t have CAD?
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In 1960, in the era before computers and CAD software, this is how designers carried out urban planning.
Yes, it used to be done by handwriting, but now there is no hand-painting. . .
Manual drawing is the basis. Back then, we also used a T-square and a set square to draw pictures. Nowadays, computer drawing is convenient and fast, but it still requires manual drawing to understand the principles of drawing.
There used to be a word called lying on the board. . .
CAD has completely eliminated manual drawing. When I was in college, there was still a requirement for manual drawing. Now, do I still take hand-drawing exams?
Sometimes I think hand-drawn drawings are more beautiful and durable than CAD drawings.
If you don’t have CAD, just use a 3D model.
In the past, a drawing tablet + T-shaped ruler was standard, and scraping was a basic skill.
Freehand drawing, that's what I used to do