| 单词 | propulsion gun |
| 释义 | Definition of propulsion gun in English:propulsion gunnoun Astronautics
Origin1950s; earliest use found in Carsbie Adams (b. 1922). Definition of propulsion gun in US English:propulsion gunnoun Astronautics
Origin1950s; earliest use found in Carsbie Adams (b. 1922). |
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