When I was a student at university, a major theme is the progressive development of materials having ever greater strength …
بعضی وقتها پیش میآید کلی کتاب و هندبوک و مقاله و وبسایت را زیر و رو میکنید و آخرش آنچه …
This presentation has been prepared to be used as a guide for validating the welding procedure specification (WPS)/procedure qualification record …
