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GB960666A
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Electrically operated liquid level detector
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GB966394A
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Improvements relating to gravity filters
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GB846312A
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Improvements in or relating to pumping mechanism for feeding proportionate quantities of liquid additive into a main body of liquid
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GB839779A
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Improvements in positive displacement pumps
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GB872738A
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An improved plant for producing an active silica sol
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GB812836A
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Improvements in or relating to positive displacement pumps
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GB801673A
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Improvements in or relating to variable stroke pumps
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GB812978A
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Improvements in liquid level indicators
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GB788803A
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An improved device for obtaining a measurement of the colour or opacity of a fluid
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GB782838A
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Improvements in or relating to pump units
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GB692675A
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Improvements in means for measuring colour or opacity of a fluid
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GB698502A
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Improvements relating to the testing of water for chlorine
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GB694122A
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Improvements in or relating to variable output pumps
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GB494469A
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Improvements in centrifugal pumps
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GB477520A
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Improvements in apparatus for use in connection with the treatment of water liable to variations in its rate of flow
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GB465409A
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Improvements in connection with swimming baths and the like
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GB190627700A
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Improvements in Apparatus for use in connection with the Filtration of Water.
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