an steam protection starling electrical matter into mechanical matter
metal is ductile. bullion is precious_metal. multi_barrelled_weapon_system is tangible_thing. milking_machine is electrical_device. soldering_iron is electrical_device. milking_machine is mechanical_device. electric_power_pylon is tangible_thing. sheetresistance is electrical_resistance. electrical_conductor is tangible_thing. electrical_hazard is tangible_thing.