What's the purpose of this?

Spillways of a dam

Single column footing

Using a vintage lettering set

Albert Einstein, 1925.

Dubai 🇦🇪

Fractal Vise

The antenna for the original World Trade Center's North Tower under constuction | 1979

Indonesia

Foundation work

There was a time this was a serious channel

Making corrugated elbow

India

Slewing bearing

Roller cone drill bit

China