Do you know what equipment is needed to produce seamless underwear? Can you tell me?

I visited Yi Yunfu’s factory. I heard that the equipment used to produce seamless underwear is a Santoni circular knitting machine imported from Italy. This is just a weaving equipment. There are also many core-spun yarn machines used to synthesize yarn, dyeing machines that they use for their own dyeing, and then there are various special machines in sewing workshops, such as lace machines, hemming machines, bartack machines, sewing machines and other equipment Bar.