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| 脉动式空气喷气发动机 | |||
| 脉冲喷射发动机; 脉冲喷射飞弹 | |||
| 脉动式喷气发动机 | |||
| pulsejet: 7 phrases in 3 subjects |
| Astronautics | 1 |
| Aviation | 2 |
| Space | 4 |
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