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2. Primary life support system - Wikipedia

   en.wikipedia.org/wiki/Primary_Life_Support_System

   The interior of the Apollo PLSS Diagram of the A7L PLSS and OPS, with interfaces to the astronaut and the Lunar Module cabin. The portable life support system used in the Apollo lunar landing missions used lithium hydroxide to remove the carbon dioxide from the breathing air, and circulated water in an open loop through a liquid-cooled garment, expelling the water into space, where it turned ...

3. Centrifugal governor - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_governor

   The balls swing out as speed increases, which closes the valve, until a balance is achieved between demand and the proportional gain of the linkage and valve. A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the flow of fuel or working fluid , so as to maintain a ...

4. Ball valve - Wikipedia

   en.wikipedia.org/wiki/Ball_valve

   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 always reduced bore, are relatively inexpensive, and are generally replaced instead of repaired.

5. Apollo Abort Guidance System - Wikipedia

   en.wikipedia.org/wiki/Apollo_Abort_Guidance_System

   The Apollo Abort Guidance System (AGS, also known as Abort Guidance Section) was a backup computer system providing an abort capability in the event of failure of the Lunar Module's primary guidance system (Apollo PGNCS) during descent, ascent or rendezvous. As an abort system, it did not support guidance for a lunar landing.

6. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   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.

7. Strategist details what to look for in ETFs going into 2025

   www.aol.com/finance/strategist-details-look-etfs...

   Listen and subscribe to Stocks in Translation on Apple Podcasts, Spotify, or wherever you find your favorite podcasts. Exchange-traded funds (ETFs) are often an essential part of a diversified ...