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DE885484C
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Method and device for the automatic determination of the calorific value of gases
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DE816165C
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Device for measuring the flow velocity (quantity) in pipelines
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DE675636C
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Device for regulating the gas flow, e.g. for luminosity measurements
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DE645305C
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Device for regulating the gas flow for calorimeters
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DE533376C
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Method and device for determining and recording the rate of ignition of gas mixtures
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DE468826C
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Procedure for clearing clogs in gas pipes
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DE486287C
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Device for the continuous analysis of gas mixtures for several components
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DE493301C
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Device for the continuous and automatic determination of nitrogen in gas mixtures
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DE467755C
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Device for continuous measurement and recording of the gas density by means of a recording micromanometer
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DE464435C
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Device for the automatic determination of the calorific value of gases
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DE408891C
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Draw and pressure gauges for furnaces
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DE393442C
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Device for the continuous analysis of gas mixtures
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DE408892C
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Pneumatic tension and pressure meter
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DE359080C
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Method and device for measuring the density of a gas
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DE390512C
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Pressure gauge for gases with a liquid column that can be moved under the test pressure
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DE338636C
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Method for determining the calorific value of gases
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DE661464C
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Device for regulating a gas flow of varying density
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DE458815C
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Device for recording measurement results from periodically working gas analysis apparatus driven by water or another liquid
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