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PL274330A1
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Nozzle for towed and remotely guided underwater crafts
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PL257448A1
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Watertight disconnectable joint
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PL257447A1
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Apparatus for measuring in test pools hydrodynamic foreces on models of fishing gear components
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PL257262A1
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Apparatus for water tunnel measurements of hydrodynamic forces in particular on components of a sweeping gear
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PL257120A1
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Hook-like hatch for ropes
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PL254317A1
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Method of and system for controlling current of compensation electrodes being used in particular in minimization of ship's electric field
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PL252997A1
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Overcurrent protection circuit for an integrated voltage regulator
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PL252543A1
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Agent for cleaning parts of fluid-flow machines
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PL252429A1
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Wire drag in particular of paired type
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PL250492A1
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Method of separating water from a lubricating oil in order to make it suitable for qualitative analysis
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PL247609A1
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Electronic direction detector for detecting direction of motion
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PL247606A1
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Electronic motion detector circuitry
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PL245958A1
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Circuit for masking of speech signals
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PL245955A1
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Circuit for masking of speech signals
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PL245598A3
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System for protecting against electrocorrosion immersed in water metallic components of a ship's hull made basically of plastic
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PL244708A2
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System for protecting port basins,in particular vessels lying therein,against stray currents
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PL244259A1
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System of protection of metal immersed elements of hull of plastics against electrocorrosion
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PL242880A1
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Driving apparatus having threades spindle in particular for operation of valves
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PL242105A1
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Force and path measuring apparatus for in hacksaw cutting operations performed under water by a diver
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PL241926A1
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Apparatus for measuring force and path of wrench manipulated by a diver under water
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