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What these valves on ships actually do, pressure, vacuum, and a tanker failure explained
These tall valves on tankers are critical safety devices designed to control pressure and vacuum inside cargo tanks. Using a real incident aboard Fairchem Philly, this explains how PV valves and PV ...
After testing 24 robot vacuums at CNET Labs to see how well they clean and avoid obstacles, we discovered an unusual relationship.
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