I just watched because this is what I did for 35 years in Canada ... the size of the castings is truly impressive.I worked 32 years in a Steel Foundry. We are the unsung heroes of all industries. Only the bravest people can do this kind of work.These giant CNC machines and forging machines not only create products with high precision but also open up a new world for modern industry.Awesome images. Sadly the commentary is only vaguely inspired by what is happening, without any detailed knowledge.