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Three area vane type hydraulic pump having force modulating flow restrictor means
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Microwave identification of railroad cars
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Microwave identification of railroad cars
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Railroad car retarder system
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Method and apparatus for replenishment at sea
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Microwave identification of railroad cars
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Method and apparatus for improving efficiency of vane pumps
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Three stage servo valve
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Retarder control systems
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Rotary vane fluid power unit
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Pressure transducer
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Retarder control systems
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Construction for pump/motor devices
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Valve and control circuit therefor
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Method of fabricating and assembling railroad brake shoes
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Apparatus for straightening shafts
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Brake and clutch assembly
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Control valve mechanism with means for reducing hydraulic shock
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Adjustable car retarder
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Disc brake
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