How a Coffee Espresso Machine Works Understanding how complex devices work can make them easier to understand and appreciate. You can also determine which device is right for you. Water temperature and pressure are two key factors in espresso machines. The water temperature should be between 195 and 204 degrees https://www-coffeee-uk81692.blog2news.com/30408845/10-life-lessons-that-we-can-learn-from-coffee-espresso-machine