a extinguisher given mechanical matter to electrical matter
fire_extinguisher is mechanical_device. escapement is mechanical_device. fire_extinguisher is device. fire_extinguisher is housewares. electrical_conduction is electrical_process. fire_extinguisher is not mechanical_device. fire_extinguisher is firefighting_equipment. fire_extinguisher is not firefighting_equipment. fire_extinguishers is devices. fire_extinguisher is not device.