Manufacture Of Tools Used For Measuring And Controlling The Flow, Level, Pressure, Or Other Variables Of Air, Liquids And Gases (Hydrometre, Flower, Barometer, Hygrimere, Etc.)

Manufacture Of Tools Used For Measuring And Controlling The Flow, Level, Pressure, Or Other Variables Of Air, Liquids And Gases (Hydrometre, Flower, Barometer, Hygrimere, Etc.)