I understand you're looking for — a classic textbook widely used in mechanical engineering, diploma, and ITI courses. However, I must clarify a few important points before providing a useful response.
You can try contacting the author, Hajra Choudhary, or the publisher directly to inquire about the availability of a free PDF or an electronic version of the book. I understand you're looking for — a classic
Various techniques including arc and gas welding, brazing, and soldering. and ITI courses. However