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A kind of automatic cleaning device
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A kind of car air-conditioner reservoir
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High efficiency sewage-treatment plant
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A kind of new pattern manhole cover
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Sewage pumping station environmental monitoring system
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A kind of tea twisting machine
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A kind of safety lifting device of discharging vehicle
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A kind of preparation method of dehydroepiandros-sterone intermediate and dehydroepiandros-sterone
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Flat filament winding machine
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Wall window frame fixing pile construction method
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Construction tool for window frame fixing pile
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Improved suitcase structure
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