Manufacturing Methods for Brass Fittings (Unedited): Forged Fittings and Nuts. — Video is incomplete, fades in and out, choppy. However, if you watch it until the end, it’s an interesting presentation. Minimal special effects. More on the cerebral side of steel. You get what you pay for. Have fun!
https://mypads.ru/aks-dlya-telefonov/