Engineering icons

[joao-fcastro]

Before submitting a new icon request, please confirm the following:

• I have searched all issues to make sure there isn't a request for this icon.
• I have searched the current library to make sure the icon doesn't already exist.
• I understand that brand icons are no longer being added and I can use SimpleIcons for my brand icon needs.
• I only intend to request a single icon (or a few near-identical ones) in this issue.

What would you use this icon for?

It will be great if we had a group of engineering items in the catalog. I don't have a specific icon to show you, but more piping icons, machine elements, architeture projects, pipe projects, new styles of valves, compressors, calculus or some stuff like that.

Give us an example of what this icon might look like.

It isn't a specific icon.