How a Coffee Espresso Machine Works Understanding how complex devices work can make them easier to use and appreciate. You can also determine which device is the best one for you. Two key espresso machine factors are pressure and temperature of the water. Water should be between 195 and 204 https://wwwcoffeeeuk01964.win-blog.com/9887783/10-locations-where-you-can-find-coffee-espresso-machine