If you have 15 minutes to spare and are an engineer, or just interested in how things are made, this is worth a look. You can skip through it quicker and still see the end result.
Десятизаходная резьба в два направления. - YouTube
and please just talk about the quality of work without going off on 'you know what' tangents.
Десятизаходная резьба в два направления. - YouTube
and please just talk about the quality of work without going off on 'you know what' tangents.