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JP2020033793A
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Metal stool
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Gear, gear mechanism and manufacture of gear
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Rotary motion device
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Transmission device using deformed gear
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Method and apparatus for shared carrier nitrification denitrification reaction
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Process for making sulfide generated by waste water, sludge, garbage and the like harmless
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Carrier for attachment of bacteria
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Carrier separating method for biological reaction tank using carrier combinedly
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Structure of biological reaction tank using carrier combinedly
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Power transmission means and inversion device
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Assembly bed
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Psa for low-concentration oxygen
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Reversing device
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Microorganism sticking use carrier for wastewater treatment
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Method and apparatus for fluidized bed type wastewater treatment
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Blodkade prevention system of pneumatic transport for powder
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Stable pressure fluctuation adsorption method
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Automatic removal device of sedimentary sand
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Production of oxygen-rich gas by pressure fluctuation adsorption process
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Operation of activated sludge treatment apparatus
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