73 / | HD | MEASURING AND TESTING |
19.01 | GAS CONTENT OF A LIQUID OR A SOLID {9} | |
19.02 | DF | .~> By gas chromatography |
19.03 | DF | .~> By vibration |
19.04 | DF | .~> By rate of flow of the gas |
19.05 | DF | .~> By pressure of the gas {1} |
19.07 | DF | .~> Of metal |
19.08 | DF | .~> Of concrete, mortar, or plastic while in a fluent state |
19.09 | DF | .~> Of mud |
19.1 | DF | .~> Of a liquid {1} |
19.12 | DF | .~> Particular separator |