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Method and device for calculating the thickness of a layer
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Sewage system device
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Non-return valve
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Bottom insert for a sewer manhole
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Hoisting system
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Insert for waste water line
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Process and device for the post-treatment of waste water containing fats
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cover
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Distributor shaft and shaft wall module.
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Locking mechanism for manhole cover
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Self-cleaning rainwater filter comprises sloping passage containing tubular element which can be rotated about its axis to vary filtration performance
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Waste water lifting station
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Sleeve for sealing a wall opening
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