I am very enjoy these beautiful photos and I think most of guys enjoy reading them.
It is difficult to make the metallograph to so excellent. Now, most of guys do not like to take so much time to do it.
又是這塊 有Twin Boundary Carbide的 420 J2 不銹鋼原材料.
There is nothing new under the Sun.
There are still lots of things you have not yet learned before you retire from your job.
So, do not say it is not possible. Learn to be open-minded.