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JP2000015289A
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Simple excretion treatment method by control of putrefying bacteria and apparatus therefor
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Biological membrane tank and production of contact material for biological membrane
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Water transfer mechanism in given water area
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Contact material for biological membrane tank and production thereof
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Water quality purifying device for water in water area of river or the like
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Contact material for biological membrane vessel
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Low load sewage treatment apparatus
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Device for purifying quality of water of river
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Water purifying method by biomembrane and biomembrane tank
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Underground tank
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Septic tank
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Water purifying apparatus
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Denitrification of hydrosphere
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Water purifying apparatus for rivers
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Method and device for purifying water
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Treatment of drainage discharged from purification tank
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Water purifying apparatus
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Water purifying facility
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Culture of useful bacteria
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Bsk bacteria activating device and underwater system using the same
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