[Reprint] Complex Machinery, Simple Principles

I have collected some GIFs from the internet that explain the principles of various mechanical constructions. Some of them are quite ingenious! For example, the ellipsograph shown below:

I might use these for future study or science popularization, so I have packaged them into a zip file to archive here and share with everyone. It includes construction diagrams for some weapons and engines, as well as some clever mechanical components. I have labeled the names of some constructions; those without labels are either self-evident or their names could not be found.