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Wall stone
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Grout for plugging and product molding
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Filter unit
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Waterway structure under embankment
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Heating radiator
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Method for evaluating structural perfection of crystalline materials
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Method for preparation of tar-mineral mix
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Water filter
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Water cleaning device
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Method of activating ash for concretes and solutions preparation
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Mineral powder for concrete mixes
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Formwork for erecting cast-in-situ r c walls
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Culvert under embankment
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Radial-flow fan impeller
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Filtering silt area
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Roof supporting structure
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Device for checking vertical installation of parts
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Water cleaning device
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Arrangement to protect working room from atmospheric air inrush through open passage with rolling stock installed therein
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Gas transportation system
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