Descriptors | Gas-supply meters, Volume flowmeters, Gas supply, Flowmeters, Flow measurement, Dimensions, Leak tests, Marking, Prepayment equipment, Accuracy, Precision, Colour codes, Diaphragms (mechanical components), Pressure testing, Pressure measurement (fluids), Ratings, Paints, Scratch tests, Humidity, Dials, Flow rates, Chemical-resistance tests, Indicating device components, Signal devices, Badges, Locks, Test equipment, Mechanical testing, Performance testing |