SCIENTIFIC ELECTRONIC INSTRUMENTS, NAMELY, SCANNERS, INFRARED GASES ANALYZERS, AUTOMOTIVE OSCILLOSCOPES, MOTOR ANALYZERS AND ENGINE ANALYZERS, AUTOMOTIVE MULTIMETERS, MANOMETERS, VACUUM GAUGES FOR ELECTRONIC INJECTION, AND OPACIMETER, NAMELY, SMOKE ANALYZER USED TO MEASURE SMOKE IN AN ENVIRONMENT; COMPUTER SOFTWARE USED FOR THE TECHNICAL AND ADMINISTRATIVE MANAGEMENT OF MACHINE AND WORKSHOPS