How a Coffee Espresso Machine Works Understanding how complex devices work can make them easier to use and appreciate. It can also help you determine which one is right for you. Two key espresso machine factors are water temperature and pressure. For optimal flavor extraction, water should be between 195-204 https://www-coffeee-uk70118.smblogsites.com/29838343/unexpected-business-strategies-that-helped-coffee-espresso-machine-achieve-success