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| foam smothering system | |||
| foam fire extinguishing system; foam fire-extinguishing system | |||
| foam extinguishing system; foamite system; froth fire extinguishing system | |||
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泡沫 灭 火系统 : 14 phrases in 3 subjects |
| Nautical | 6 |
| Navigation | 1 |
| Technology | 7 |
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