https://www.openlearning.com/u..../daltoncohen-spq4kf/
https://notes.io/wNHYH
How a Coffee Espresso Machine Works Understanding how complex devices work will make them easier to use and appreciate. It can also help you decide which one is the best fit for you. Water temperature and pressure are two of the most important factors in espresso machines. Water should be between 195 and 204 degrees Fahrenheit in order to achieve optimal flavor extraction. The pressure is important however if it's too high, the coffee