Before the spread of the Internet, everyone dealt with letters and stamps. One of the pastimes of that time was to separate the stamp from the envelope and keep it. I also had a stamp album when I was a teenager. Therefore, it is not strange that when I started my career as a welding engineer, I looked for the connection between postage stamps and welding.
The file below is the result of that effort.
PS: Unfortunately, I have not written down the references that I used.
Pressure vessel design is not in my scope of work, but I have often had the need to know its components. I think this is a necessity for many other engineers with various specialties. Below pages reference: Pressure Vessel Design …
What is the etymology of the elements in the periodic table? Like any discipline of science, chemistry has its own …
