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Device for supervising the content of gas in liquid
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Measuring device for measuring a fluid flow
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Electric analyzer for supervising substances dissolved in a flow of liquid
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A process and apparatus for the manufacture of solutions of bactericidal gas in water or aqueous liquid
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Improvements in the regulation of gas valves
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Quantity controlled chlorinating installation
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Chlorinating installation
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Control valve for controlling the admission of chlorine into water
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Device for measuring the content of gas in liquid
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Quantity and quality controlled chlorinating installation
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Dosing pump
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Electric analyzer for supervising substances dissolved in a flow of liquid
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