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DD284719A5
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Arrangement of river bed seals for changing hydraulic loading ropes
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DD260057A1
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Method for the disposal of high density wastewaters
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DD249304A1
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Method for producing closed sludge tanks in assembly construction
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Process for preventing drive hydraulically reversible loaded sealing structures in mains
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DD228581A1
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Process for limiting the forming of cylinder sheets of liquid containers
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Device for the frequency analogue conversion of relative high and smallest tilt changes
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Device for hydrometric measurements
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DE1299256B
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Device to protect against flooding of a motor for a comminution unit working under water in feed ducts for sewage treatment plants
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GB1203426A
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Device for destroying surface scum in sewage and sludge treatment installations
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DE1658144A1
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Device for the destruction of floating cover in sewage and sludge treatment plants, as well as for the circulation of fluids
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Equipment for the rough treatment of raw water according to the floating filter principle
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DE1609025A1
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Device for the hydromechanical clearing of long sand traps
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DE1609024A1
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Process and device for carrying out the process for the hydromechanical clearing of long sand traps in purification plants
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