English Other Mechanics / Mech Engineering Chillers

The text talks about chillers that are used to cool down industrial equipment. One of the applications of a chiller is EDM. I have found that EDM stands for many things, I just can't decide which one suits my context. Thanks for your help.

Chiller Applications
Chillers are used in many industrial applications. The most common applications are:

Plastics
In the plastics industry chillers are used for cooling the hot plastic that is injected, blown extruded or stamped. Chillers can also be used to cool down the equipment used in the manufacturing process.

Laser
Chillers are used to cool down the lasers and the power supplies used to power them.

Printing
Chillers remove the heat generated by the printing rollers and also cool down the paper after it comes out of the ink drying ovens.

EDM
Chillers keep machinery at ambient temperature during the cutting process.

Machine Tooling
Chillers cool the spindle of the machine as it produces the part and cools the liquid being sprayed on part itself as it is being turned on the spindle.