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Truly vertical flow upflow tank with complete volumetric transit for water and wastetreatment
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Off position retainable door operated electric switch
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Effluent removal structure for settling tanks and reservoirs
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Self-luminous turbidity observation device for water works basins
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Externally controlled fog wiper for liquid meter register glasses
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Dust ring mounted change gear finding scale for water meter testing
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Attachable change gear finding scale for water meter testing
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Slide rule type calculator for a-bomb radiation monitoring
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Articulated surface washing device with oscillatory nozzles for filter beds
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Regenerable desiccator
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Bacteriological test bottle
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