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Vacuum pumps are combined with chambers and operational procedures into a wide variety of vacuum systems. Sometimes more than one pump will be used (in series or in parallel) in a single application. A partial vacuum, or rough vacuum, can be created using a positive displacement pump that transports a gas load from an inlet port to an outlet ...
This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.
A gas lift or bubble pump is a type of pump that can raise fluid between elevations by introducing gas bubbles into a vertical outlet tube; as the bubbles rise within the tube they cause a drop in the hydrostatic pressure behind them, causing the fluid to be pulled up.
The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the direction of flow: a rotating gas compressor; a combustor; a compressor-driving turbine. Additional components have to be added to the gas generator to suit its application.
A guest worker from Cuba, working in an East German factory (Chemiefaserkombinat "Wilhelm Pieck"), 1986. After the division of Germany into East and West in 1949, East Germany faced an acute labour shortage, mainly because of East Germans fleeing into the western zones occupied by the Allies; [35] in 1966 the GDR (German Democratic Republic) signed its first guest worker contract with Poland. [36]
The prototype of the B-17 crashed on October 30, 1935. The first Boeing B-17 Flying Fortress ever built, the initial Model 299 aircraft, was lost in just this way on October 30, 1935, when its gust locks were left engaged, with the resulting crash killing Boeing chief test pilot Leslie Tower and United States Army Air Corps test pilot Ployer Peter Hill. [1]
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