Here is a video to explain how arc welding works.
https://youtu.be/TeBX6cKKHWY?si=WKiVnzRUnCE6f9lD
Hi, here is a link to this company that focusses on using honeycomb paper product to strengthen structures:
A good video on understanding trusses and the forces acting on them.
This video shows what a telescopic mechanism is and how it is installed. It is suitable for products that require extension.
Here is a cool video by 3M using the concept of RG machine.
Link is at: https://youtu.be/v0nm_QE91ag
The video shows how structures can be made rigid using Origami.