Check - examine In order to ascertain accuracy, high-quality, or affliction; "check the brakes"; "Check out the engine" 32. (Devices) Section of the action of a piano that arrests the backward motion of the hammer immediately after it has struck a string and holds it until finally The important thing https://utube.ai/%d9%be%d9%88%d8%b1%d9%88%d9%86-%d9%87%d8%a7%d9%be/