machine; machinery

to use / to employ / to make use of, to apply / to spend

pulverization

to pulverize; to break up; to smash

stone

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

use one thing for many purposes / work someone hard

to use one's head

grinder, mill

a stone / (slang, electronics) a transistor