G PHYSICS
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G01 MEASURING; TESTING
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G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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7/00 Analysing materials by measuring the pressure or volume of a gas or vapour
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G01N7/02 by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
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G01N7/06 by combustion alone
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