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.
برای همسن و سالهاي من (بچههای سي چهل سال پيش) آمدن بهار و نوروز لطف دیگری داشت! اینموقعهای سال که …
The clean energy transition will be mineral intensive, requiring a variety of specific metals.
In choosing materials of construction, we have to compromise between various factors. Use the acronym SHAMROCK to summarize and remember some of them. S = Safety: what are the consequences of failure? If they are serious, a more resistant material …
