Meanings of technical illustration in English

He was never formally trained in technical illustration, but visual explanation clearly comes naturally to Hess.

It was done with slide rules or people doing technical illustration or building models to figure how this is gonna work.

They will repeat a technical illustration hundreds of times it may be, but with little or no thought directed to the performance.

I can make technical illustrations.

Gallant's science writing and Hess's technical illustrations made a perfect match and together developed into a series of children's books on science and exploration.