use, usage

friction

oil solution

machine; machinery

reduce, decrease, subtract

use, utilize

器械: a device, an appliance, a mechanism / 機械: a machine, equipment, an apparatus / 器械: a utensil, a tool, an instrument / 器械: a tool for conducting a test or experiment or for measurement

angle of friction

trade friction, trade conflict

The activity of rubbing one's body with a dry cloth, thought to strengthen or warm up one's skin, and therefore to prevent from winter illnesses, such as cold.