an electrical machine investigating base to operate
electric_drill is electrical_device. mri_machine is electrical_device. single_device_test_structure is electrical_component. milking_machine is electrical_device. endoscope is electrical_device. electrical_test_structure is test_structure. single_device_test_structure is electrical_test_structure. electrical_junction is electrical_device. pinball_machine is electrical_device. engine_starter is electrical_device.