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A kind of hand wheel type underwater sealing door
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A kind of keeper formula underwater sealing door
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Unpowered catch basin
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Novel intercepting well and control method thereof
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Intercepting well with check function
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Mixed flow pipeline based rainwater regional split-flow system
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Region sectioning rainwater treatment system based on separate-system pipe network
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Combined-system rainwater diversion, regulation, storage and treatment system
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Separate system first rain regulation and storage treatment system
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Separate-system rainwater diversion, regulation and storage and treatment system
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Zone partition rainwater treatment system based on mixed flow pipe network
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