Ive been to the farms as well
basically what is done is the cows are herded to a milking barn and metal rods are placed on their udders
the udders are hooked up to some machine that sucks out the milk and it is put into a Giant vat
There arent milkmaids anymore sitting on a stool milking the cow, it takes too long, The machine can milk the cow fairly quickly
Also if you have ever been to a farm, there are always alot of flies there. The machines prevent the flies from getting into the milk vat which is an issue for the health inspectors