CA967488A
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Treatment of sewage or other organic sludges
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GB1172600A
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Bird Repellers
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GB1180245A
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Improvements in or relating to Material Lifting Apparatus for Sludge, Sand and like Materials
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GB1180244A
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Improvements in or relating to Elevators for Material Lifting Apparatus
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GB1182312A
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Force Transmitting Device
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GB1185164A
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Improvements in or relating to the Treatment of Sewage and other Organic Sludges
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GB1185163A
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Improvements in or Relating to the Treatment of Sewage and Other Organic Sludges
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GB1059709A
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Sludge-evacuation method and apparatus
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GB1098531A
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Cross-cut sludge lifter
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GB1176471A
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Method of Purifying Supernatant Water
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GB981140A
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Improvements relating to adjustable louvres
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GB981771A
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Improvements relating to roof ventilators
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GB985857A
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Improvements relating to roof ventilators for extracting air from buildings
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GB1025206A
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Method of and means for scraping rectangular tanks
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GB927686A
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Improvements relating to apparatus for use with sludge drying beds
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US3155611A
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Apparatus for treatment of sewage and like sludges
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GB933099A
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Improvements in or relating to sludge evacuation valves
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GB892572A
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Improvements relating to apparatus for use with sludge drying beds
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GB886912A
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Improvements relating to circular settling tanks
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GB909872A
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Improvements relating to the treatment of sewage and like sludges
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