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Sparging device
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Gassing apparatus
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Assembly for circulating a liquid
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METHOD FOR EXCHANGING FABRICS IN A LIQUID
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Process for biochemical substance conversion and apparatus for carrying out the process
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Rake
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METHOD FOR THE BIOCHEMICAL IMPLEMENTATION OF SUBSTANCES
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Process and apparatus for the aeration of a liquid, especially waste water
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METHOD AND DEVICE FOR WASTE WATER TREATMENT
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METHOD FOR HEAT RECOVERY
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METHOD AND DEVICE FOR TREATING A LIQUID
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METHOD FOR TREATING A LIQUID
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Aeration frit for introducing gas into a liquid
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METHOD AND DEVICE FOR TREATING WASTEWATER
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Sewage aeration system - by relative motion against revolving aerator with porous tubes producing fine bubbles
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Sewage basin cover - by sealing inflatable float ring and domed flexible sheath
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