| English term or phrase: liquid bulk | | Propulsion systems utilizing cryogenic liquid oxygen and/or hydrogen, such as the Space Shuffle, Atlas/Centaur, Delta, etc., are currently filled from the facility storage tanks and subsequently allowed to cool in the flight tanks in order to reject the heat absorbed by the liquid as a result of environmental heat leak, transfer line, and tank wall chill-down. The cooling of the **liquid bulk** is desirable in order to increase the liquid density so that more impulse mass can be stored in the tank, and also to reduce the liquid vapor pressure so that the tank operating pressure and tank weight is minimized |
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The translation workplace 
peer agreement (net): +6