In a rocket, the part of a fuel tank that is not occupied by fuel; the volume of this part.
| 单词 | θ208062 |
| 释义 | society > travel > air or space travel > a means of conveyance through the air > spacecraft > rocket > [noun] > types of rocket engine > part or volume of fuel tank without fuel (1) ullage1956 In a rocket, the part of a fuel tank that is not occupied by fuel; the volume of this part. |
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