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DE2155730A1
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Pipe support - with height-adjustable saddle and length -adjustable strap
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GB1271120A
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Improvements in or relating to supporting means for pipe or pipe work
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GB1213294A
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Improvements in or relating to a clip-and-stand for a pipe
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GB1212825A
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Improvements in or relating to a porous diffuser and mounting means therefor
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GB1026384A
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Improvements in or relating to aerators
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GB934146A
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Improvements in or relating to the purification or treatment of sewage and other liquors
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GB875798A
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Improvements in or relating to the treatment of sewage, or industrial waste effluent
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US2639131A
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Diffuser for gases
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GB660666A
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Improvements in or relating to means for diffusing gases into liquids
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GB651167A
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Improvements in and relating to the aeration treatment of sewage
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GB605046A
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Improvements in or relating to diffusers for diffusing gases into liquids
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GB606418A
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Improvements in or relating to diffusers for diffusing gases into liquids
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GB411425A
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Improvements in and connected with the purification of sewage and other impure liquids
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GB397841A
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Improvements in means or apparatus for supplying air or gas in a more or less finely divided state to liquids
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GB400940A
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Improvements in means or apparatus for supplying air or gas in a more or less finelydivided state to liquids
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ES108544A1
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Improvements in or relating to the process of purification of dirty water and other impure liquids by sludge or activated sludge.
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GB285944A
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Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid
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GB188958A
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Improvements in and connected with processes and plant for the treating of sewage and like liquid
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GB187315A
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Improvements in or connected with the treatment of sewage and other impure liquids
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GB170032A
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Improvements in or connected with the separation or settlement of matters in suspension in sewage and other liquids from such liquids
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