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| pneumatic injection | |||
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| pneumatic fed (混凝土) | |||
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气压 喷 射 : 44 phrases in 9 subjects |
| Automobiles | 15 |
| Aviation | 3 |
| Bridge construction | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 3 |
| Metallurgy | 1 |
| Nautical | 1 |
| Space | 1 |
| Technology | 18 |
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