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| 双元燃料火箭推进剂; 双基推进剂〔火箭燃料〕 | |||
| 双基推进剂 | |||
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| 双基硝化甘油和硝化纤维推进剂火箭燃料 | |||
| 双基火箭燃料 | |||
| 双基推进剂 | |||
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double base propellant : 18 phrases in 4 subjects |
| Aviation | 3 |
| General | 2 |
| Space | 12 |
| Technology | 1 |
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