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| 火花塞试验器 | |||
| 压力计 | |||
| 高压容器; 高压气瓶 | |||
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pressure bomb : 7 phrases in 5 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 3 |
| Technology | 1 |
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