[Class : 9] Leak Detectors, Gas Detectors, Gas Detection Systems, Combustible Gas Detectors, Gas Leak Alarms, Gas Leak Alarm Systems, Gas Analysis Apparatus, Scientific, Nautical, Surveying, Photographic, Cinematographic, Optical, Weighing, Measuring, Signalling, Checking [Supervision], LifeĀSaving And Teaching Apparatus And Instruments; Apparatus And Instruments For Conduct...