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| pre-production | |||
| pilot plant scale production; pilot production; preproduction; test production | |||
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试验 性生产 : 19 phrases in 11 subjects |
| Agriculture | 1 |
| Aviation | 2 |
| Commerce | 1 |
| Compressors | 1 |
| Economy | 3 |
| Hydroelectric power stations | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Plastics | 2 |
| Space | 1 |
| Technology | 3 |
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