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| development type; developmental prototype | |||
| prototype unit | |||
| preproduction model | |||
| pilot sample | |||
| 试制样品: 6 phrases in 6 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 1 |
| Commerce | 1 |
| Economy | 1 |
| Technology | 1 |
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