How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines use pressure to push water through coffee grounds. This type of brewing makes more strength than drip coffee. These machines require nine bars of pressure to extract the flavor from the ground. There are three primary kinds of https://wwwcoffeeeuk94018.designi1.com/51653784/the-history-of-coffee-machines-espresso-in-10-milestones