does anyone send me pdf file to understand GD&T application??
I used the book titled Geometric Dimensioning and Tolerancing by David A. Madsen, and David P. Madsen. It was deffinately helpful and a required textbook for my GD&T course I took in college. It's up to date and goes off of ASME Y14.5-2009 standards which is the latest so I'd give that book a try if you can find it.
Here's the book on amazon. It's a bit pricey but worth the investment for certain.