What is the difference between "equipment" and "device" in patent application?

Equipment refers to a set of devices that basically have specific physical form and specific functions and can be used by people for a long time, such as lathes, boilers, pumps, steam turbines, etc.

Device refers to the objects in machines, instruments and equipment with complex structure and some independent functions.

Difference: the equipment is a complete concept, and the device is a partially independent object.

There is no difference between the two words in the patent, and the specific concern is its components, not its name.