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| 硝化纤维、棉花火药 | |||
| 硝酸纤维素; 硝化棉 | |||
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nitro-cellulose : 8 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 3 |
| Shipbuilding | 2 |
| Technology | 3 |
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