What is the differences between up milling and down milling?

he difference between down milling and up milling is the directions. When you say down milling, the direction of the cutter is going to the same direction of your feed. While for up milling, the direction of your cutter is going against the feed. The cutter and the feed would go to opposite directions

radiation

explanation:

heat is transmitted by radiation

answer(20) psi;