Stainless steel pipes are cold drawn.
How is the barrel made? It is said that it was drilled first, right? ..
How is the barrel made?
Domestic military guns are generally deep-hole drilling or precision forging, while foreign guns are seamless or precision forging. This is why the China gun is durable.
Seamless steel pipe for civil guns.
How are ordinary stitches made? Only a few cents is so delicate.
Cold drawing low carbon steel wire to diameter, cutting, centerless grinding, punching, carburizing, tempering, correction and barrel plating. The efficiency is so high that the daily output can be recorded in tons. The price is not low, a few cents each, with a ton price of 10,000 yuan, and the added value is not low.
By the way, I heard that bottles are usually fried. Ha ha ha ha ha ha. .........