a hand dryer is a kind of electrical device for drying hair
damper is device. hand_blower is dryer. blow_dryer is hair_dryer. clothes_dryer is box. hand_blower is not dryer. blow_dryer is small_appliance. hair_dryer is electrical_household_appliance. blow_dryer is manual_tool. clothes_dryer is dryer. dryer is appliance.