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Aviation History
1952
1952 - 0557.PDF
29 FEBRUARY 1952 FLIGHT "IftWH UVhD Alii If* FIT l/KAULiw '^^^^|PPWlW*t,'"v'' m TYPE 4600 - Y PATENTS PENDING ^HYDEL' ELECTRO-HYDRAULIC \m-Hkf SELECTOR VALVE A solenoid operated slide valve weighing 2.5 lb. suitable for high rates of flow, rapid response, and pressures up to 4,000 pounds per square inch. DOWTY EQUIPMENT LIMITED • CHELTENHAM
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