I share practical processing experience (profiling and facilitating the valves of an internal combustion engine) without using machine tools. I did it earlier when I could only dream about machine tools.
Subtitles in your language, turn them on in the youtube settings for this video.
Hooray ! I now have INSTAGRAM / igor.negoda (I usually make a lot of photos for avatars - now I have to post them).
1 янв 2017