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2. Double check valve - Wikipedia

   en.wikipedia.org/wiki/Double_check_valve

   A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

3. Ball valve - Wikipedia

   en.wikipedia.org/wiki/Ball_valve

   The maximum working pressure of high-pressure ball valves can be up to 15,000 psi (1,000 bar). High-pressure ball valves are often used in hydraulic systems, so they are also known as hydraulic ball valves. Ball valves in sizes up to 2 inches (51 mm) generally come in a single piece, two or three-piece designs. One-piece ball valves are almost ...

4. Apollo (spacecraft) - Wikipedia

   en.wikipedia.org/wiki/Apollo_(spacecraft)

   The Apollo spacecraft was composed of three parts designed to accomplish the American Apollo program 's goal of landing astronauts on the Moon by the end of the 1960s and returning them safely to Earth. The expendable (single-use) spacecraft consisted of a combined command and service module (CSM) and an Apollo Lunar Module (LM).

5. Apollo Guidance Computer - Wikipedia

   en.wikipedia.org/wiki/Apollo_Guidance_Computer

   Dimensions. 24 in × 12.5 in × 6.5 in (61 cm × 32 cm × 17 cm) The Apollo Guidance Computer ( AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo command module (CM) and Apollo Lunar Module (LM). The AGC provided computation and electronic interfaces for guidance, navigation, and control of the ...

6. Gene Kranz - Wikipedia

   en.wikipedia.org/wiki/Gene_Kranz

   Eugene Francis Kranz (born August 17, 1933) is an American aerospace engineer who served as NASA 's second Chief Flight Director, directing missions of the Mercury, Gemini, and Apollo programs, including the first lunar landing mission, Apollo 11. He directed the successful efforts by the Mission Control team to save the crew of Apollo 13, and ...

7. Harris tops Trump by 9 points among young voters in new survey

   www.aol.com/harris-tops-trump-9-points-185643331...

   Vice President Harris leads former President Trump by 9 points among young voters in a new poll, marking the latest shift in support from a demographic President Biden struggled to capture before ...